An activity that involves stimulating the genitals, and in theory is pleasurable for at least one of the people involved. The most obvious example of this is when a dick is inserted into a pussy, pulled part way out, then pushed back in, and repeated several times until the man empties his balls or has his dick go limp because he either had too much to drink or not enough. However, there are countless variations, including anal sex, oral sex, gay sex, a gang bang, a hand job, a titty job, a etc. Also sex can be done by any number of people.

It is difficult to make a clear distinction between what is having sex and what is just fooling around or foreplay, or something else, and different people generally have different ideas about what is and isn't sex. For example, former President Bill Clinton believes that sex is not sex when it is done between the President of the United States and his intern, or perhaps any member of the White House staff, we don't know for sure.

Most species of plants and animals use sex as a means of reproduction, and sex has had a vital role in the evolution of most plants and animals.
The front page story of the New York times was pretty good this morning. They had all the details, the president's intern started coming on to him. He had some really important work to do, but said fuck it, I really could use a break right now! So first he stuck his hand up her dress and finger-fucked her til she squirted all over his hand, then she deep throated him and when her tits were all messy with her slobber she gave him a titty job, then he fucked the shit out of her and jizzed all over her dress. But it's not sex because that new law says that sex is only defined as something that people other than politicians and their staff do.
by Woody Alien September 23, 2011
i dunno about humans. but clams.... wow.

clams begin their lives as males, developing sex organs in about a year. when they get older, they may become female. now that's hot. basically they both let their stuff out into the ocean and it makes itself. they are so sexual that if they have real sex they won't be able to bare it and can die. the "stuff" meets up somewhere downstream and makes a larva that grows a foot, grabs the sand, makes a shell, and becomes a clam.
example? two clams had sex.
by oh-baby-oh-baby May 23, 2009
Something that WoWfags will never experience
<WoWfag1> "what ish sex liek???oneone11"
<WoWfag2> "iunno, LOL!!"
by Xtreme2252 March 09, 2009
When a Dick is slid inside of a pussy.

One night I decided to go clubbing with a few of my friends. We were drinking and having so much fun flirting with guys. One guy came up to the 4 of us and said do you want to go home with me? My friends comment was arent we too much for you, and we all laughed. And he said well pick some other guys then. I decided to have the rule only if your willing to fuck one yourself. Well then he said as long as I get to fuck all three of you.

So we went and found another guy willing to join in on our party. We left the club and went back to courney's place.

He got everyone a drink and said well hows this going to go down. I made the comment and said the more you 2 do together we'll do together and to you guys. When the guy(jason) started sucking the other guy (trever) I was like thats enough no further please. Who really wants to see a guy have sex.. LoL

Well courtney and Tiffany and I were already stripped and sitting next to eachother rubbing eachothers pussy's. Jason went to tiffany and Trever came over to me and courtney. we both nealt down and sucked his dick...he was very hard and big at that I would say about 8 or 9 inches. I stopped liking and sucking his dick and went down and layed on the floor and started licking courts pussy. the room was full of moans and groans. The sound was enough to keep making me hornier.

Jason and tiff came over to join us in our party and jason got on top of me and slid his hard shaft inside of me I was screaming and biting at courtneys clit. I had 2 orgasims before jason go off inside me letting of warm juices. he got up and I seen courtney went to his dick and started sucking it and tiffany came to me and licked the cum out of my wet juicy pussy. In the end we all got fucked a couple times that nite by eachother and by two hot and hard men..we got their numbers and every so often we all get together and have an orgi party
Sex is very fun when there is 3 or more people involved
by Sexy Bi July 16, 2008
A question
The answer is yes.
by kwang June 04, 2003
When a man inserts his penis into a woman's vagina with the goal of producing cum and orgasming. It can be proceed by various forms of oral sex such as blow jobs and eating out
One day I came home late from work. I thought that my girlfriend/roommate Katie would be mad at me. However, when I walked through the door, she was sitting on the table in the kitchen wearing nothing more than she had been born in, her legs spread wide with her pink pussy glistening. "I've been waiting for you" she said, and immediately hopped of the table and ripped off my pants. I fell backward onto the floor, and she began to give me the best blowjob I had ever had. It was pure heaven. Even when I came in her mouth, she didn't pull away. As I stiffened again, she suddenly stopped and rearranged herself in the famous "69" position on top of me. I began to eat her out, and she made the most amazing sounds I have ever heard come from a person's mouth. Suddenly there was a knock at the door. "Answer it" Katie told me, "I asked a friend over". I went to the door, my erect penis in hand. When I opened it, I was greeted by Annmarie, Katie's best friend and the owner of the hugest boobs I had ever seen. She was wearing a tight pink tank top and a black mini-skirt, but not for long. She stepped over the threshold and ripped off her cloths, her breasts heaving with her breathing. She walked right past me and started eating out Katie, who was sitting on the couch. They were both making such nice sounds that I simply watched for a few minutes, pleasuring myself. Then Katie looked at me and motioned me towards Annmarie's butt. I took the hint and immediately began fucking her up the ass. She screamed in pain and pleasure mixed, and continued to eat Katie out, as I slammed into her again and again, faster and harder than I had ever fucked anyone in my entire life. Suddenly, I felt myself about to cum. I pulled out of Annmarie and shoved her onto the couch next to Katie and gave them both the biggest facial that they had ever had. This was the best night of my life, oral sex and anal sex with two beautiful girls.
by hornyman79 January 11, 2009
1. Gender. Male or Female.

2. The greatest way for two people to earn great pleasure.
1. Name? ... Joe Sex? ... Male

2. John was horny. He wanted to have sex with shannon. John sat down on the couch next to Shannon. He put his hand on her thigh, and she looked at him with love in her eyes. He leaned closer and kissed her until they were making out feverishly. John ripped off Shannon's shirt and undid her bra. Shannon pulled John's shirt off as he began to massage her breasts in rhythm with their french kissing. She reached down and unzipped his jeans and hers, pulling them both down. He used one hand to pull off her panties. Then he removed his boxers, revealing an enourmous penis - nearly nine inches long. Shannon rubbed his penis until he was harder hen steel. His cock was so wide that she couldn't come close to getting her whole hand wrapped around it. By that time she was soaking wet, and he was ready to enter her.
He went in with his first stroke and Shannon moaned with how deep he went. He began to slide in and out, faster and harder. He used his thumb to gently massage her cilt, and started to suck on her breasts. She felt her pleasure building up inside of her, and she knew she was about to come. He hit her g-spot and she screamed with joy as she hit orgasm. John still hadn't come yet, and her screams made him even harder, so he kept penetrating her deeper and harder and faster.
Shannon became lost in his rhythm, and felt the plesure building up again.
"Ooohhhhh! John! Harder! Ooohhhhh! Yes! Yes!" she yelled, uncontrollably. He continued to massage her cilt with his fingers.
She writhed underneath him as she had another earth-shattering orgasm from her g-spot and her cilt at the exact same time. John finally came into her, and pulled out of her.
Best. Sex. Ever.
by lostinlost12345 August 13, 2007

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