What is so unappealing about red lipstick?

quackingkafreen
From time to time I wear red lipstick to school, whether guys find it appealing or not. Generally, I've noticed that girls find it attractive, whether on themselves or someone else, and guys pretty much find it repulsing. I'm cool with that, it's all opinions, but it makes me curious why such a large number of guys find it unappealing?

Yes, I understand that red lipstick can look harsh, making it hard to pull off. It isn't exactly natural either, I understand that too, but yet it's so classy and fierce. Even for the girls that can pull it off, which I admire, though, nearly all guys I know don't find it attractive.

Your opinions about it?
What is so unappealing about red lipstick?
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