I saw changes in Semen.  I am impotent so I started taking Horny Goat Weed and Maca.  I noticed the volume of Semen was a lot more than usual.  As I go longer on BO and PM my desires changed I started enjoying P spot and A spot orgasms.  The ejaculate from those is less thick and seems like it lacks semen.  If I go on to have multiple orgasm including a P A and regular one the amount seems like a lot and I feel my testicles have worked out and are sore.