FWIW, I've got three daughters, all adults now. We've talked about the evolution of the 'casual sex nomitive' and their consensus was that as a group it was ok to call everyone guys like "Hey guys, let's go to the beach!" but in the singular it they preferred the use of 'gal'. Further the use of guy/gal was preferred in casual speech over man/woman.

I suspect at some point every word may be pejorative in some way.