The way we got onto the subject was that we just started the unit on ailments.
And this conversation happened:
Prof: So... you all have learned this sign to mean 'shit.' But it's not... it's not like bullshit. It's not a cuss word. It's actual shit. It's a descriptive classifier, so you have it this way, and then this way...
Student: But what about the in-between?
Prof: The... in-between?
Student: You know, when you're not constipated, and you're not...
Prof: Oh, you mean a regular shit.
It was pretty much the funniest conversation to ever happen in an ASL class. We also learned the signs for male and female orgasm, because he was teaching us the sign for 'bug bite,' and the only difference between the sign for 'bug' and 'male orgasm' is two slight finger twitches.