Scabies is an infestation of the top layer of skin caused by the parasite. Scabies are passed on through close physical contact. Transmission is more likely when partners spend the night together than during a brief sexual encounter.
Molluscum contagiosum is a skin disease caused by the molluscum contagiosum virus (MCV)
Once a disease primarily of children, molluscum has evolved to become a sexually transmitted infection in adults.
Mycoplasma genitalium, or Mgen, was first identified in 1981. It is a bacterium that can infect the reproductive tract and is passed on through sexual contact.
Pubic lice, also known as crabs, are small parasites that are usually found on the pubic hair. Symptoms of crabs can be bothersome, but in general crabs don't cause anything more than discomfort and inconvenience.