Why are attractive girls more likely to be sluts?

Anonymous
I hear this from guys all the time.
friends: "don't go for her she's a slut".
me: "how do you know? have you ever even seen her before?"
them: "just look at her man."
me: "shes dressed pretty conservatively. just because she's hot she's a slut?"
them: "well attractive girls tend to be sluttier than your average girl. just saying"

so why do people think that the more attractive a girl is, the more likely they are to be a slut or exhibit slutty behavior? please don't just say they are stupid or something like that.
Updates
+1 y
please don't answer this question if you are not going to answer my question. thanks.
Why are attractive girls more likely to be sluts?
25 Opinion