I've only ever "received" unprotected oral (no kissing, intercourse, oral on her). I've seen about 6 different Sex Workers in the past year, usually every few weeks. About 2 months ago I had what felt like a small pea size bump on the opening to my anus. It felt kind of like a blister, and usually only hurt when I had a bowel movement. It went away after about 2 weeks on its own... but since about that time my bowel movements have changed. I used to be very 'loose' and would go once per day, and didn't have to push and seemed fairly healthy. Now my anus feels like it doesn't want to open as much as it used to, and my stool has been thinner, and more difficult to get out. (Nothing has changed in my diet). One of my concerns/questions is around saliva. Usually the oral can get a lot sloppy, and saliva is running often down over my testicles and to my anus. Is there any kind of STD that is likely/possibly to occur from this? It's been 4 weeks since my last engagement, and I've had no symptoms like discharge from my penis, or open sores. My anus just feels different though. I don't believe I can see any blood in my stool, but it's really difficult to say as the water always seems to be dark (and I'm color blind!!) I'm waiting for Chlamydia and Gonorrhea tests to come back at the moment, but worry about things like Anal Warts or Syphilis. I suppose it could be hemorroids, but I think they would have presented some more clear symptoms (blood)? I'm 50.