I have also heard that caffeine is good for mens sperm. Someone can correct me if I am wrong but I am sure I heard in the documentary "In the womb" (that was aired on Foxtedl) that it says caffeine help men's sperm to become faster!!! I remember thinking I was going to get rob to drink cups of it when we were TTCing.

I know it can hinder a woman's chance of conception drinking too much coffee but not for men.