Generalizations

So last night Will, Torston, and I went to a small wine festival being held in Jülich, where we met up with 4 other guys. I've gotten used to being the only female in attendance at most of these things, but not so much to some of the baffling stuff that gets said. For example, I tried a Rose wine, and then a dry white wine (this is probably not the order you're supposed to go in; I know nothing about wine culture), and was talking about how the Rose was really a bit too sweet, and how I liked drier wines more. Robert then said "Huh, but I thought you would like sweet wines, because you're a girl."

"Sorry, what?"

"Because girls usually like sweeter wines."

"This is based on an n of what?"

There were several seconds of confusion as to what I was talking about, before he said this was based on two other girls he knew. We all had a laugh. Then I decided to go ahead and jump in all the way now I’d started. I said “Usually the variance within a gender is larger than the difference between the genders.” You know, which it is.
He seemed a little taken aback (my interpretation, of course), and said he wouldn’t generalize again, but I’m not sure whether this was just said for a laugh (“I’ll never generalize again! Haha! Never!”) or what.

What I really should have said was “Say the same thing you just said, but put “guys” in instead of girls. Does the statement make sense any more? ‘I would’ve thought you’d like that wine, because guys usually like sweeter (or whatever) wines.’ And it probably doesn’t make sense anymore, because you all recognize that guys are a pretty diverse group of people, and probably all have different tastes. If it doesn’t make sense to say for a guy, the same statement doesn’t make sense to say for a girl – we’re not all the same, weird, different being.”

But then, as they say, this is just how it works: