Justhuman,
I've been a nurse for almost as long as you have been alive, (if that is really your age). And you are right about skin to skin contact, but that's for herpes. Gon. and Chly are transmitted by body fluid to open/mucus membranes as well as syphillis, HIV, HPV. And the test that he had done is for routine screening, you don't necessarily have to wait to have symptoms unlike herpes.
We really need to be careful giving medical opinions when we don't know all the facts. When in doubt always ask your physician.
nj