Sperm count can be affected by a number of factors. One of them is indeed hot water.
There are many urban legends and wives’ tales out there about conception. However, the legend of hot water impeding your man’s fertility is not one of them.
If you can keep your partner out of hot showers or baths, his sperm count will be higher. This gives you both a better shot at conceiving. When his scrotum is roughly one degree cooler than the rest of his body, his sperm count is at its best. That’s why the testicles are located on the outside of a man’s body.
This is simply one of those differences between men and women. Women’s bodies protect their fertility because everything is deep inside your body, where its temperature can be maintained. The testicles are positioned externally, which indicates the need for the area to be slightly cooler.
What should you do if your man simply must soak himself each night? Turn down the water temperature to around body temperature (37 degrees). This will ensure the safety of your fertility efforts.
If he has been consistently bathing in very hot water, do not despair. The damage to his sperm count from hot water is not permanent.