"You have to kiss a lot of frogs to find your prince."
be a princess - kiss the frog
In my personal opinion, only females who are not selectively dating, will end up kissing way too many frogs.
I think it's an insult to the real princes among men who would be one's more ideal match. Also, depending on who on earth these women have been dating, it could well be an insult to frogs, as well.
Personally, even in my youth, I was not ready to date just anyone, simply because they asked. I had to know them, and how they behaved, and how they treated girls or women in general, and if they were respectful toward their mother and father, too.
There's another saying, which states that, however a man treats his mother, is how he will treat his wife. Also in my opinion, that also applies to women (girls).