Is it possible to receive any kind of STD or infection by "dry humping" ? A friend told me there was. Is it true that an STD or infection can be passed through clothes? If neither partners have STDs, there should be no risk at all, right? STDs can be passed on, not created, correct?
A basic model for STI transmission describes transmission in two different ways: either through contact with FLUID (like semen or vaginal secretions) or direct skin-to-skin CONTACT. Here's the breakdown:
STIs spread by FLUIDS:
Gonorrhea, Chlamydia, HIV, Urinary Tract Infections/ Nongonnococcal Urethritis, Hepatitis B (HBV), (Hepatitis is also found in saliva, so kissing is a risk), Syphilis Cytomegalovirus (CMV), Trichomoniasis (Trich)
STIs spread by CONTACT (skin-to-skin, or skin-to-mucous membrane):
HPV/Genital Warts, Herpes Simplex Virus (HSV), Molluscum Contagiosum, Chancroid, Syphilis, Crabs/Pubic Lice, Scabies
Also, transmission happens from an infected person to an uninfected person. You can't create an STI through any kind of activity.