What is 3sum?
where 3 ppl, usually either 2 males and a female or 2 females and a male have sex together, lots of diff postions and is quality to do !!
u blow me girl and u the other girl sit on my face
Engaging in sex acts with two other people; either MMF or FFM. Usually used in text speak.
Wanna 3sum 2nite?
Most peopl fantasise about 3sums