Hi! I had a brief encounter with a stranger. I masturbated him gently for a minute or two, definitely not longer. His penis did not even get erect. Are there any chances at all for me to contract any STD through such a hand-to-genital contact? I know that it is highly unlikely yey certain pages claim that a number of diseases can be caught this way. He did not touch me at all, only me stroking his penis. Thanks a lot in advance!