Not an even an incel thing, this guy’s had sex, has had a long term girlfriend previously, but for some reason just doesn’t come to meetups with women there any more and even makes an excuse to leave if a woman he doesn’t know well arrives unexpectedly
Hard to say, should probably just ask him. Maybe he’s not interested in your friend group or w/e in the presence of women because y’all change when women are around. Maybe he’s not self conscious around the guys but when a woman shows he’s anxious about his potential BO. Or maybe he doesn’t have time or patience for surprise guests, of any sex. I know my personal tolerance for social pleasantries and courtesies has cratered since COVID lockdown.