Long ago surgeons figured out that shaving a body part prior to surgery actually increased rather than decreased surgical site infections. No matter what expensive and complex weapons are used—razor blades, electric shavers, tweezers, waxing, depilatories, electrolysis—hair, like crab grass, always grows back and eventually wins. In the mean time, the skin suffers the effects of the scorched battlefield. Pubic hair removal naturally irritates and inflames the hair follicles left behind, leaving microscopic open wounds. Rather than suffering a comparison to a bristle brush, frequent hair removal is necessary to stay smooth, causing regular irritation of the shaved or waxed area. When that irritation is combined with the warm moist environment of the genitals, it becomes a happy culture media for some of the nastiest of bacterial pathogens, namely group A streptococcus, staphylococcus aureus and its recently mutated cousin methicillin resistant staph aureus (MRSA). There is an increase in staph boils and abscesses, necessitating incisions to drain the infection, resulting in scarring that can be significant. It is not at all unusual to find pustules and other hair follicle inflammation papules on shaved genitals.
Additionally, I’ve seen cellulitis (soft tissue bacterial infection without abscess) of the scrotum, labia and penis from spread of bacteria from shaving or from sexual contact with strep or staph bacteria from a partner’s skin.