What the hell is up with all these people rushing in here thinking it's about guinea pigs having sex!? Any animal or human that is being tested on or used in an experiment can be referred to as a "guinea pig," because guinea pigs are often used in laboratory studies...
Because the caption under the video says "guinea pigs" but he meant that the humans in the video were acting like guinea pigs because it wouldn't be hard to find volunteers to have sex.
I saw this video a couple years ago, and I didn't find it disgusting then, nor do I now. And even though I'm gay... a vagina is a lot more appealing than an asshole filled with ****. You girls are living in a fairy tale world.
I'm telling you vagina is the devil. Like i said before it's nothing but a sea creature with wrinkles & flaps waiting to devour your penis with one snap.