Hi, I have exposure I had a meeting today with a man I am also a man in the pool he rubbed his penis on my back and under the armpit There was no contact between my genitals Just touching our genitals with our hands only lasted for 20 seconds He rubbed the back and under the armpit What is the probability can get Sexual diseases and what if I had a wound in my back can I get hiv or hsk or syphilis or herpes?
There is no risk here. STDs are transmitted by unclothed oral to genital, genital to genital, and genital to anal contact, usually the kind associated with oral, vaginal or anal sex.
Backs and armpits do not get STDs, and unless you had significant friction and a decent wound, one could not enter the skin of the back or arm pit.
You have nothing to worry about here.