Teenagers love to experiment with their sexuality and often, this experimentation comes in the form of a double threesome. What is a double threesome? Well, it is two people having sex in one bed (most commonly used in adult movies). Teenagers love this type of threesome because the two people involved are much more open (no one is scared or ashamed of anyone) and this leads to double the chances of having an amazing orgasm while performing oral sex on each other..