You hopefully caught this bit on last night's Daily Show, where Jon Stewart and Rob Corddry were having fun attributing footwear to gay sex in men's bathrooms:
JS: So different taps mean different things?
RC: That's right Jon, it's a complex language. Wing tips mean you're a married man. Socks with sandals means this is your first time. Oh, and Jon, any one of those brightly colored plastic crocs, that means
anything goes. We're talking hard-core ass-to-mouth stuff; scat play!
And Jon, that's not just in bathrooms, OK? Anytime you see anyone wearing crocs, be wary. Be wary.
JS: What does that mean Rob?
RC: If they are wearing crocs they are soliciting incredibly deprived gay sex. You can take that to the bank.
(The video in question is currently the main clip on the Daily Show site.)