Yup, I get them too. I have a tendency of being a "love at first sight" kind of person, as in I will get an immediate crush on someone who I know nothing about. Even if I find out I have nothing in common with them, something still draws me to them. If I get to know them better, I'll find out they aren't the perfect dreamboats I had built up in my mind and I might be able to make a friend at the end of the day. If I
don't get to know them better, the crush just takes a couple more months to fade away completely. No big deal, it happens. We're only human and we have fleeting schoolgirl crushes from time to time, regardless of age.
Sometimes you just see some attractive (not necessarily physical) qualities in a person and you crush on them a little... or a lot. I did this recently with a guy who I thought was very hot physically. Well, my kind of hot, anyway, as well as a kind personality. I find out he has a wife and a litter and, in spite of the fact that Duhs turn me off any other time, I still found him to be handsome when his brats and wife weren't around because then I could pretend for a moment or two that he was single. But eventually that crush disappeared on its own. I also had a big crush on one of my classmates in grad school and, aside from our major, we had absolutely nothing in common. I hardly spoke to him until my last year, and even when we did, it was just idle chit-chat. I bonded far more with the other two people in my class.
Don't feel bad about having crushes now and then. They're harmless and normal, and just because you have them doesn't mean you don't love your husband any less. Being in a relationship doesn't mean you aren't gonna admire/ogle someone else from time to time, be it a porn star or the hot neighbor shirtlessly mowing the lawn. Plus, you share these thoughts with your husband and I assume it's something he doesn't mind hearing if you guys are still together. This tells me that he feels very secure in his relationship with you. I think most guys would get jealous and pouty over it.
Best advice I can give is just to try and relax and enjoy your crush without guilt. It'll pass in time.
