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She: "Why do some men spit in public?" He: "He's signalling high mating value via conspicuous waste. He's saying his saliva stocks are so great, he can waste some and still have saliva to spare". She: "Why do some men do Evolutionary Psychology in public?"
If it's sexually repulsive, it's not a sexually selected signal.
Exactly.
Well, repulsive to females, but some kind of signal to other males?
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