Organisms of many species are specialized into male and female varieties, each known as a sex. Sexual reproduction involves the combining and mixing of genetic traits: specialized cells known as gametes combine to form offspring that inherit traits from each parent. The gametes produced by an organism define its sex: males produce small gametes (e.g. spermatozoa, or sperm, in animals) while females produce large gametes (ova, or egg cells). Individual organisms which produce both male and female gametes are termed hermaphroditic. Gametes can be identical in form and function (known as isogamy), but, in many cases, an asymmetry has evolved such that two different types of gametes (heterogametes) exist (known as anisogamy).
Physical differences are often associated with the different sexes of an organism; these sexual dimorphisms can reflect the different reproductive pressures the sexes experience. For instance, mate choice and sexual selection can accelerate the evolution of physical differences between the sexes.
Physical differences are often associated with the different sexes of an organism; these sexual dimorphisms can reflect the different reproductive pressures the sexes experience. For instance, mate choice and sexual selection can accelerate the evolution of physical differences between the sexes.
by boibot21 September 25, 2020
Get the sexmug. 18 and over read only.
Sex has multiple different meanings, let's go over the most known one.
Sex — sexual activity, including sexual intercourse: for example; humping a person is having sex. if you mate a person, that also counts as having sex.
Sex has multiple different meanings, let's go over the most known one.
Sex — sexual activity, including sexual intercourse: for example; humping a person is having sex. if you mate a person, that also counts as having sex.
Person A: Let's get it on that girl over there! She be lookin' hot!
Person B: You maniac, don't tell me you're going to have sex with a person that you don't even know!
Person A: Oh I will have sex with her!
Person B: You maniac, don't tell me you're going to have sex with a person that you don't even know!
Person A: Oh I will have sex with her!
by cherr.yl_ — FD4U! September 11, 2022
Get the sexmug. When a mum and dad fall in love so much and get into bed naked dad sees mums boobs and mum sees dad mum sees dad willy
by ColleenBallinger March 17, 2020
Get the Sexmug. I was sitting on the couch and she was sat next to me I stared at her as she read her book. Her tits were huge. She then realised that I was looking. I quickly turned away. “Sorry” I said awkwardly. “Don’t be” then she leaned in. Our lips locked. It was amazing. I grabbed her neck as she held my thigh. She stopped and moaned loudly in my ear. I was so turned on. After that we moved into her bedroom. She ripped my clothes off- everything but my bra and thong. I then did the same to her. I sat on the bed and then she straddled me. Her fingers grazed my body. Her touch felt so tender. She undid my bra strap and took my bra off. I fell back on the bed and she started to suck my tits. It started in circles but ended on her sucking my nipples. I moaned so loud. She then licked down my body down to where my thong was. She slipped it off so slowly and then ate me out. She hit my clit so many times . I came and she ate me out even more. I told her I had a surprise for her so we rolled over and I got the vibrator out the bedside table. I took her thong off and shoved it in her already wet pussy she moaned louder than me after a while we decided to watch some porn and we both got super horny again. We started making out and then we scissored for most of the night she then shoved the vibrator in my pussy until we both fell asleep
Oooo sex
by Bikiniporn_isagoodsong September 2, 2021
Get the Sexmug. by Randomgoodcontent May 13, 2022
Get the Sexmug. by justabean#1339 April 12, 2021
Get the Sexmug. Studies Entomology and Xylography
by Evryon July 24, 2020
Get the Sexmug.