Why is there more female vegetarians then males?

I have noticed that more vegetarians are women and i was curious why.
Update: Well i dont eat meat to get muscle, i eat it because its nice to eat.
Update 2: One other thing to add, how are any of those things instincts, a man could do either of those things (excluding birth) and saying women are more intelligent is total bull, im sorry to mention but look at the history, most of the things ever discovered or invented have been by men, enough said sorry
Update 3: Sorry but how does being a vegetarian make you clever? I guess Einstien must of been a total idiot because he ate meat.
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