I think it is normal and healthy. It doesn't mean you have to do anything about it. You just need to learn how to control it. I think it's a good sign. I think there is less chance, but there is still a chance that HIV can be passed on to you.
Some people believe that saliva has an anti viral effect.
If someone has HIV, there is probably a little less chance of getting it through oral compared to other ways, but the chance is still there. The concentration of HIV is probably a little less in vaginal secretions than in semen. If you have infections or abrasions in your mouth, then there is a risk. My girlfriend recently told me I climax too fast for her liking, and I really want to satisfy her. Men normally climax quickly unless they train themselves to extend themselves.