Out of sperm
It means that you have done a lot of hand job or you had a lot of sex just in a single week.
Maria: Hi Justinpx, I am so horny right now... Can u come please for one more time?
Justinpx: Hi Maria, sincerely i am out of sperm. Maybe next week cutie?
Justinpx: Hi Maria, sincerely i am out of sperm. Maybe next week cutie?