My waxer told me that it is easier to do male private part waxing if the client is erect, because it stretches the skin taut. So ( fortunately for me) he makes sure I'm erect when he gets to my groin and genitals. He does the ass and crack first and, while he is applying the wax, I am on all fours on the table with my elbows on the table and my ass in the air ( the classic " fuck me" position"). While he is applying the wax with one hand, the other is clutching my balls and cock to prevent hot wax from dripping on them and to stimulate me to erection. Then, after he has waxed the backside, he takes lotion and applies it to the waxed area, paying special attention to my crack and hole. This gets me much harder, so, when it's time to turn over, I am fully erect and his job is made easier. After the waxing, he makes sure to spend some time applying lotion to the area and moving his hand up and down my erection with plenty of lotion; it feels heavenly. So, don't worry about getting hard. It makes the waxer's job easier.