Is it normal to want to have sex with a girl while she is dressed?

My girlfriend and I very sexually active. We have sex in many different ways, and ocasionally I like to fuck her with her clothes on. Like, if she wears a cute outfit one day, and it drives me absolutely crazy and I get super horny just by looking at her in this outfit, I want to have sex with her without her getting undressed.

However, I find that this is the case more often when she is dressed modestly, like when she wears a pretty skirts and a tight sweater, rather than when she is dressed slightly slutty like wearing tight mini skirts or dresses for a party.

I just feel like her clothing adds more to the sex somehow.