First of all, to answer your first question: as long as your lubricant is not made in the factory by people with AIDS and bleeds into the lubricant, and you buy it and open it within two minutes , use, and if your brother or girl happens to have a wound, he will not get it. Therefore, the probability of infection is about the same as winning the lottery 10 times a day.
Second, AIDS is a virus that does not occur for no reason, so if both parties do not have it, they will not get it.
Of course, there is also a situation where there are no symptoms of AIDS during the incubation period, but it can be contagious at this time