Briefs that raise penis. Again, there is no scientific evidence to prove that underwear affects penis size. 21.05.2018 Sasho 8 Comments By Dr. Children born to mothers having such exposure are known to have small genitals and also testicular abnormalities at times. Even though there is no scientific evidence to prove that briefs affect male fertility, there is sufficient evidence to prove that increase in temperature of testes can reduce sperm count. Juma 18 Dear Juma, The size of the penis depends on many factors. Juma 18 Dear Juma, The size of the penis depends on many factors. Smarter Shopping Better Living! This is because the edge of the lose undergarment may tend to fold causing discomfort. Men who used briefs loved the tight fit that prevented testicles and penis from swinging around when walking or even running. Genocide deniers must be stopped — British author Linda Melvern. Wearing cotton or synthetic blends will prevent chaffing. Most people avoided wearing boxers because it had the tendency to move upwards when running or walking. Boxers which just mould around the buttocks are comfortable for most of the people, who have to sit for long hours continuously.