As a gay guy myself, if i find a fwb or a hook up, that is all it is, and will be. Funny how "straight guys" sit on a high horse acting like we want to marry you just because you are "straight acting" or married to a woman. Get your shit together guys, some of us are more straight acting then you so called "straight people". Just be upfront upon meeting and say, "i just want my cock sucked, and my load swallowed, nothing else." or "i want to suck your cock and swallow, and nothing else." The other person can either take it or leave it. Beating around the bush will get you in bad situations.
back to the subject, you can easily download a hook up app, like grindr, scruff, adam4adam. Work your magic from there. You can easily delete the app and profile as necessary. You don't need to place your picture either, just send it to whoever you think may be a match, and go from there. That way you remain anonymous and you can chat with whoever your lil heart desires.