A senior urologist discovers all the things that harm the male sperm. Wearing tight underwear may harm the sperm count and fertility.
Smoking has a negative effect on sperm production. Frequent use of a cell phone may harm sperm quality. The quality of sperm decreases with increasing age. The sperm of men who smoke has a reduced fertility and lower chances of implantation of the embryo. The average ejaculate volume is the size of half a teaspoon. If we add the length of all the sperms in one ejaculation we will reach 10 kilometers.