PhysicsGirl:
I call bullshit. Of course some people are normal. If you want to debate what's acceptable in real terms, or what's generally considered acceptable by most people, or whether it matters to sensible people what others think of their habits or proclivities, or what the reasonable boundaries of normalcy are, I can get into discussions on those subjects. But the fact that you (or I) might resent the idea that others might judge us based on their concept of what is acceptable or normal does not negate the fact that the habits and proclivites of some individuals fall into (or don't) what would generally be considered common to most people within a given culture (ie. - they are "normal").
PhysicsGirl:
If you can't tell your potential spouse about your sexual kinks, who can you tell?
This, I agree with, but I still stand by my initial statement. The problem isn't that the behavior is kinky. It's that the behavior seems to be central to his being. It's not just a fantasy or a fun thing he might like to do, it's a full blown fetish. Which, is, legitimately, an issue for a partner who doesn't share that particular kink. Also, I would posit that it is entirely legitimate to consider a person unbalanced if such a habit is that important to them. There are deeper psychological issues at work than just a personal clothing preference.
Am I being judgmental? Absolutely. Or, maybe I'm just expressing an opinion. But if someone else has no objection to such behaviors in their significant others, I'm perfectly happy to let them go about their personal business without comment. People are entitled to be happy however they find they can. But I know what I'd do in this situation.