Only condoms can protect against an STI. Only condoms have been proven to reduce the risk of getting some STDs. According to the HHS Office on Women's Health, the male latex condom is the best method for protecting against STDs, including HIV/AIDS. Polyurethane condoms are an effective alternative if either partner has a latex allergy.
Benign is harmless, malignant is dangerous.
I believe it is Fast-twitch muscle fibers. Slow-twitch fibers are used for people who exercise for a long period of time such as running, swimming, and cycling.
