Condoms and Cancers
Women, this post should be of particular interest to you. It appears that the unprotected male outside of a monogamous relationship could cause your cervical or uterine cancer to worsen. This is no surprise as we have known for years that aids tends to spread faster in areas where condoms are not used as a shield/form of birth control. Unless you are absolutely sure of your partners past sexually speaking I suggest "gloving up". If the guy doesn't want to do that for your sake, maybe he is not worth keeping around in the first place.
Just a thought