How many would you consider to be too many for a man?
First, a consensus number is absurd because what one man considers "inappropriate", another might not. Second, what's "too many" is most likely based on out-dated notions of female sexuality, that A. they don't enjoy sex as much as men... B. that even if they enjoy it, on account of being a woman, she shouldn't have as many partners as a man. So you're most likely using a standard that you wouldn't hold men up to, or yourself. Third, you're unaware of your partner's number, and she meets all of your wants, desires, and in every way fulfills you in the relationship, the discovery of her number would be a dealbreaker?
I'm not arguing that everyone should be happy to hear if their girlfriend has had 100 different partners by 21. But if you think that's too many or inappropriate for a woman, then you should feel the same way about a man. I see a lot of members on Niketalk complaining about how women want "to be treated like a man", well here's a great time for you to treat her like one. If you're comfortable with a lot of partners for yourself, then be comfortable with your partners higher number. If you prefer to only been with a few women in your lifetime, then sure, look for that in a woman. But I can't help but laugh at the "dream" of getting a girl who hasn't been with any other guys, like they all sign a guest book and you have to look at it every time you have sex... or their pictures are hung up in your bedroom and you have to stare at them the whole time.