I don't care about making a good impression with the vulgar friends of a friend
Why doesn't it matter how you appear to the friends of your friend?
I don't find any of them that attractive.
It's understandable that you don't feel a need to impress them. It's okay to not care about the opinions of people you don't even like.
Ok, well maybe I do have some sexual attraction to them.
That seems kind of silly to make such a big fuss if you like them. Do you even plan on telling them about it? Or are you trying to feel out the situation?