The medical experts say it takes 4 days for your sperm count to return to normal level. He must have been shooting blanks on some occasions or really going hard on his shlong to get something out.
Where do you come up with this shit man? There's been years in my life where if there's a woman in my bed, then I'd have sex every night.
Sperm count, wtf?
And to answer the thread title, nobody fucking knows!