I normally have low libido,always beat at the tip of my penis, low sperm count ,watery sperm ,inability to go more than one round during sex,?

Refractory period: Unlike women who can have multiple orgasms, men must deal w/refractory period which prevents same. As we age, refractory period increases in duration, such that while we were once able to have multiple sessions in one evening, we are now limited to once a night, some to less frequent than that! Check out http://www.issm.info/education-for-all/sexual-health-qa/what-is-the-refractory-period