Women release around 300-400 eggs during their lifetimes, while men produce millions of sperm each day. Sperm are energetic little guys, that's for sure. However, there are many external factors that can affect sperm health and since it takes two and a half months for sperm to mature, if you damage them at any point along the way, you can render yourself at least temporarily infertile.
HOT, HOT, HOT!!