I agree, you don't, but no shame - you aren't the only one around here who doesn't.
..but you agree - male masterbation is a sin.
PS: and oh btw, men produce spermatazoonz no matter how much they are spilled.
Google inquiry:
Your testicles are constantly producing new sperm in spermatogenesis. The full process takes about 64 days. During spermatogenesis, your testicles make several million sperm per day — about 1,500 per second. By the end of a full sperm production cycle, you can regenerate up to 8 billion sperm.
You see, practice makes perfect.
..but for ladies:
At birth, the normal female ovary contains about 1-2 million/oocytes (eggs). Females are not capable of making new eggs, and in fact, there is a continuous decline in the total number of eggs each month. By the time a girl enters puberty, only about 25% of her lifetime total egg pool remains, around 300,000.