Are threesomes a good thing

Hell no! You could get STD's! Possibly even die if it was that hardcore, and why the hell would you do something as disgusting as that. It may seem like a pleasure, but those things in live always have a bad answer which is the most possible answer.

i agree 100% with the above answer,besides people who have threesomes tend to break up at a faster and also loose trust from others and end up extremely sick with diseases.