I also didn't have an issue with the joke at the end because, well, I was thinking the exact same thing.

I think my issue there was that it seemed to me a clear connection was drawn between her religious beliefs and her attitudes about her sexuality, so making an abrupt change in the latter in the heat of the moment implies a change in the former, as well, without any of the careful reflection I would hope a person would make when making a significant change in a particular religious view. To me, the writers dismissed the whole idea of religious conviction for the sake of a joke.

OTOH, if it were instead implied that she was a virgin because sex just wasn't something she'd felt the need to seek out before, and now she did, I would have felt a lot differently, I think.

Regardless, no diminishment of opinions felt! I hope you don't mind me laying out a little more explicitly what bothered me about that scene; partly it was an excuse to lay it out for myself. :)

Yes, Mystery Spot is the ep I mentioned a few weeks ago. It's such a wonderful mix of comedy and awfulness - it works so well on both levels at once.