Which is to say: a smoker, a frequent psilocybin user, a transgendered person, a furry, and an ABDL fetishist all walk into a bar... and hang out amicably, because they've all been through shit.
(One slightly annoying thing about this, though, is that this empathy-for-outré-groups-building effect stops happening as your own group becomes less outré. Homosexuality is accepted enough today that the newest generation of gay people are growing up just as intolerant of "deviance" as everyone else.)