I fantasize about my boyfriend in lingerie, but i'm a straight female

I'm a straight female, I've always only dated guys my whole life. But recently, I've started fantasizing about my boyfriend in lingerie and felt kind of turned on by that. He is somewhat hairy and muscular (not the slim feminine type at all) but I would like to see him dressed in lace panties and maybe a lace bra and high heels. But I'm too shy and afraid to tell him this fantasy in case he might think I'm crazy or accuse me of being bisexual or lesbian. I don't know if this is normal of me to think like this and I can't figure out why.