All those exposures are extremely low risk, probably zero. Choose your partners wisely, share HIV status, and use condoms for anal sex. If you do those things, your risk of HIV and other STDs is low; the rest of it, including the kind of details you ask about, just doesn't matter.
People who try to not follow their sexual instincts probably are less safe in the long run. Young (straight) people who take "the pledge" to remain virgins have HIGHER rates of STD and unwanted pregnancy than kids who do not take the pledge. Why? Because when temptation overcomes resolve, it's often in the setting of alcohol, lack of condoms, and/or a spur of the moment decision with someone who looks cute--often very unsafe. If you are sexually attracted to men, you probably would be wiser to think about how to forge safe, sexually satisfying relationships. You might need mental health counseling--not to address your feelings for men, which is not a sign of abnormality, but about the balance between those feelings and the risks that go with them.
But no more posts as new questions. You could have asked this in follow-up to the previous string, and each new question prevents someone else from asking a new one.
Good luck-- HHH, MD
Dr...one more question:
Is mouth ulcer a sign of HIV infection? I'm not sure whether the red bump in my mouth I was talking about is mouth ulcer or not.
The red bump (I think it also had some white on it) was rather pointy.
I searched images of mouth ulcers, and they look rather smooth than pointy. is this true?
I wanted to go to see a health care provider but the bump is almost disappear now. So I dont know if that's gonna work or not.
Thank you
Probably nothing. Definitely not a sign of HIV.
HHH, MD