Women, how would you feel about a partner who wants to be exclusive before any physical intimacy?

I'm sure men have run into something like this before, but I'd like to know what women think about a man who feels this way. I'm not able to separate the physical and emotional connection with someone, and now that I want to date more seriously (With the intent of starting a family after 3 or so years of dating a woman) I don't want to create that emotional attachment until I think there's a potential for that future with a woman. I want to be clear, I'm into this woman and have been wanting to kiss her for weeks now but up until we both agree to be exclusive I don't want to cross that bridge. I've talked about this with the woman I'm dating and we appear to be on the same page in terms of long term goal for a relationship, but I'd like to know what other women's reactions to being told this might be.
Women, how would you feel about a partner who wants to be exclusive before any physical intimacy?
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