Other men

So I've been with my husband for going on 6 years we got married March of this year after meeting him I've never really had interest in other men like he's always just been like the perfect guy make me feel good he's amazing he's great with our kids you know nothing I really ever need to complain about is it normal for women to fantasize about doing things with other men or having a crush on other men cuz there's a kid at work that I talk to all the time and he's really cute and I feel like I have a crush on him I even dream about being with this co-worker is that normal for a married woman to start getting weird feelings even when I walk past another guy now I look at him and on my wow you look delicious and like I said I'd never had those feelings for other guys before being with my husband is there something wrong with me is this normal