What if your wife contracted it? And STD's are not limited to sexual relations, they are actually blood desieses. Say your wife contracted HIV from a dodgy doctor using a used needle, will your anti-condom use protect you from your own wife? Especially if you sleep with her before anyone has any clue? The answer is no, you fail and you are now HIV+ for thinking STD's are purely sex based & your always safe with your monogamous partner.