Its like Sexting, but with Skype, and theres boobs, and people can watch each other. Its quite possibly the most epic way of having sex, without having sex.
Performing sexual acts with another person through a live video interface.
Basically it's like phone sex through video chat.
Usually skype.
Boy: Hey wanna skex tonight after school?
Girl: Idk... I've never skexed before.
Boy: Don't worry about it, skexing is fun. And I won't tell all of my friends about it...
Girl: Ok
Similar to sleep walking, sleep sexing is when two people copulate while being asleep. Usually they wake up in the middle and figure out what's going on then after it's over fall back asleep. Later on they might even think it was a dream.
Yes it is endemic at MIT. Yes there is an explanation. According
to Jerry Letvin, serveral years ago in his comparative psysiology
class he explained how one sexes a toad. It seems that if you
squeeze a male toad just behind the front legs, he will croak. A
female will not. Thus a toad in a pond in the middle of the night
can determine whether the other toad next to him is an
appropriate subject of his amorous attentions by climbing on and
listening. Apparently, it became semi-popular amongst some MIT
students to sheak up on each other & poke from both sides just
under the arms. Thus "no toad sexing".