Lets examine that for a moment "Men treat tramps like ladies and ladies like tramps".
This statement implies tramps = easy women or women who have sex easily or with anyone.
This statement implies ladies = opposite of tramps or women who are not giving it up much.
Men love sex. Men always want to have sex.
So naturally men will treat a women who is providing sex better then one who is not. This I believe could be considered fact.
So to redo the statement "Men treat women who provide sex better then women who do not" is pretty much the same statement more crudely worded.
I would say this one is true, not sometimes but almost always.