I had a friend tell me last week not to orgasm during my fertile time, because the vagina becomes too acidic and kills sperm on contact. She said orgasm after sex was fine, but not before my hubby finishes. I thoroughly enjoy sex with my husband and easily orgasm. My friend has been an OB GYN nurse for over 15 years so I'm sure she knows her stuff, but I just think it'll be so difficult! Has anyone else heard anything about this?