Why do guys say "You look like a girl only good for sex"?

Hi I'm 31 F. Lots of guys on dating apps message me with "Hey you look like you are good for only sex. Come over my house right now and bring a paper bag to put over your face".

I haven't had sex in 7 years and I am definitely not promiscuous. I have posted pictures of myself in jeans, T-Shirt and turtlenecks. Definitely no sexy pictures at all as I am looking for a serious relationship.

So why do men only view me as a one night delivery sex thing?
Why do guys say "You look like a girl only good for sex"?
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