Commando-Style has its many advantages such as the comfort it provides since the restrictive and tight sensation of underwear is eliminated (view is relative to the one doing it), there is greater mobility for the genitalia, and it’s also recognized with playful sexual behavior.
Not wearing underwear is said to have certain benefits. Wearing no underwear while sleeping can have significant benefits to the vulva. It is also said that tight underwear decreases sperm count in men, and it is recommended to wear more loose fitting clothing around the genitals.
C-Note, from "Who's Your Caddy?"