1-Would you go up and ask him about them out of curiosity, it would make a good conversation.
2- If they fit him well would you compliment him or grab his ass?
3- Would you avoid him, too awkward.
4- Would you assume he's gay?
5- Do you think some women's jeans like bootcut or boyfriend are acceptable on some Men with suitable body type (thinner frame?)
6- Any of you find it sexy he is confident to wear something bold and different, that he might be worth checking out?