When a chick with a dick cumz on the back of another chick with a dick and then throws a had full of glitter on their back.

When you have sexual intercorse with a minor and she squirts all over your treasure trail right down to your ass hole

Three people fisting a girl at the same time. She is also blowing a dude with honey and laxatives on his dick.

When you rub lard on your bare ass, tie yourself to a pickup truck with a long rope, and have a friend drive you down the streets of Myrtle Beach

While performing anal sex, you pull your dick out and drop several "just-add-water" foam expanding dinosaur capsules in her asshole. Then reinsert, pee in her butt and wait. Some of the dinosaurs will flow out when you're done. The others will stay in there for a while and give your wife/girlfriend a nice surprise the next time she TRIES to drop a deuce.

Ejaculating in a woman with her ass and the air and sliding the cum down between her cheeks with your dick.

When you're looking up something on Wikipedia, but while reading about it, you encounter several other concepts you are not familiar with. Naive internet users will proceed to also look up those concepts on Wikipedia (said concepts are usually written as links when mentioned in the text, and therefore intrigue readers enough to click on them). They, in turn, lead to other Wikipedia pages, and before you know it, you've gone from reading about string theory, to studying dinosaur erotica in incognito mode.