Why is it considered offensive if you appreciate the female form?

I think it's fine to appreciate and verbally express appreciation for anyone who takes care of themselves - men appreciating the hotties, women appreciating a guy, etc, as long as he/she remains faithful and HONEST. It's the ones that aren't honest, and don't express that appreciation that you have to watch out for. You know, those self righteous ones who go behind your back - you know who you are.