It's the same for escorts. That's why you want to be a good customer. Just because they do it for the money doesn't mean they aren't enjoying it. And it sure beats women who will marry you for your money. Not if you use a condom and practice safe sex.
Escorts are actually safer than most women because they actually use condoms.
Men are 400 times less likely to get AIDS from a woman as a woman is from a man. It's a downstream disease. I also recommend washing up afterwards with an antibacterial soap. Paying money or getting it for free has nothing to do with disease. If you get it for free you are more likely to get a disease without a condom than you are from a call girl with a condom.