Males will often continue to be their "friends", probably in the off chance they get the opportunity to get into their Bra one day.
"No mate, she just has Facebook Bipolar. I'd still shag her though, Hence we're still friends....just incase. You know?"
"Ah, yeah, OK. Gotcha. I know a Bipolar facebooker too. Annoying aren't they?!"
"Tell me about it dude.... tell me about it!