This is a common sight at bars (hence the word barsexual) but can also be found at any party, especially frat parties.
The reason for such acts has baffled researchers for years, but it is thought that they seek attention, free drinks, or are prudes too scared to get with men.
Dude 2: No you idiot, those are barsexuals.
Dude 1: Damn, you're right. Sluts!!!
*If any of the following situations arise during your own barsexual display, you must either stop and leave the party immediately or enter the witness protection system the next day as those pictures will be going up on facebook whether you like it or not. Try to avoid situations where dirty, horny men are either cheering you on, telling you they don't believe you did it and asking to see it again, are counting the number of seconds you can make out for, or have convinced you that making out with her topless is the only way to do it.
Usually localised to a bar or the like and same 2 chicks would never kiss elsewhere.
"look at that guy over there, do you think he will notice if we pash?"
2 chicks pash in order to get guy... guy is titillated by bar-sexual behaviour