CRABS AND HEAD LICE
Over-the-counter anti-lice medications work very well. Speak to a pharmacist about the best kind to buy. Usually the generic or cheapest is fine. Rarely, does it take more than one application. You should also wash your clothes and bedding, or at least remove them from contact with humans for 3 days.
Pubic lice are passed from direct skin-to-skin contact and could be spread by mutual masturbation from one person's pubic area to another's. Lice live on hair follicles so, yes, the absence of hair greatly reduces their ability to infest an area of the body. Condoms do not cover pubic hair, so they don't routinely protect against this STD.
While crabs are easy to transmit, fortunately they are not very common and are easily treatable. They are more of a nuisance than anything else.
To your health,
STD TRANSMISSION AND PREVENTION ADVICE
Latex, polyurethane, male, female -- we've got the lowdown on them all.