How many men can I sleep with before I've ruined myself for marriage?

I come from a traditional family and would like to get married one day. I currently live in a multicultural city and have been enjoying meeting different men. In particular there is one guy but he's not interested in a relationship and has told me so. Just wondering if I'm setting myself up to fail longterm.

How many men can I sleep with before I've ruined myself for marriage?
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