Yes! Mouth does the work and gets the reward! Part of it for me is feeling that muscle throbbing when it has its happy ending
Although I showed a trick I was taught from someone who loved giving blowjobs but averse to cum in her mouth. I was surprised it felt better than I expected and it allowed her to keep doing her thing, and I watched my cumshot, a turn on when triggered by a woman
i like porn where the male is having a blowjob and come in mouth and the female is masturbating to orgasm