Hmmm. I guess this isn't something I've experienced myself, as my brain works in exactly the opposite way: I'm more likely to be attracted to someone I feel comfortable with, and have a hard time grokking why comfortable would equal non-sexy.

Do they quite definitely consider him non-sexy, or have they just never happened to think of him that way? (I mean, would they maybe wake up and consider it if he asked, or has he asked?)