Something about keeping the sperm in fresh supply:
“I remember one couple in which the woman would only let the man ejaculate when she was in her fertile period, so the poor chap was going without for almost a month at a time.“But if sperm is released in a steady stream, the sperm that is ejaculated are newer and less damaged.
“There is a trade-off between genetic damage and quantity, so when a couple is first trying to get pregnant a wait of two to three days is probably advisable.
