What if your goal is to specifically suppress fertility [0]? Do you have a checkbox that says "I am making efforts to reduce my sperm count"?
IME, it takes about 3 weeks of consistent effort to get one's swimmers to go away. Maybe you know what is it about "3 weeks" in the spermatogenesis process?
[0] https://en.wikipedia.org/wiki/Heat-based_contraception
(edit IMO -> IME)