question about demisexuality and aesthetic attraction

I don't know how I can be classified. When I am not in love,I feel aesthetic attraction towards other men.But when I fall in love....pufff...it shuts down.I can't see attractiveness in any other men except my partner. Now I am married and I feel he's the only handsome man for me. And he says the same to me.He feels I am the only beautiful woman for him. He says he becomes like blind when he's truly in love.He thinks that it's because of the personality of a person.But I don't know why it happens. Is it something related to demisexuality or something like that?cause I asked about it on some forums and yahoo.answers etc and some people answered "I am feeling the same way and I am demisexual,maybe you and your husband,too."Or is there another name for that?Some says "true love","finding your soul mate" etc. It just bothers me that my husband is feeling the same way,cause I can't think of a man who doesn't find any other woman attractive but again when I talk about my doubts people tell me "What? Can't he feel this way because he owns a penis?" I don't know. I just want your replies.

We only find our partner attractive, and he feels the same way toward us, but we do see aesthetic beauty in other people, regardless of gender... the same way a person might see aesthetic beauty in a tree, or an elegantly designed building or car, or a painting.

For us, those are simply two totally different categories of aesthetics. We would never think to kiss a tree or be intimate with a painting.