Precisely, a woman can control her mouth much better than her vagina. Some women can't even control her vagina. With a blowjob, there are so many variations as well, it's no just like pumping a vagina. A woman who knows know to blow well is priceless. She would make you feel like you have a slut all under your control, licking your balls, looking at you with her slutty eyes, using her tongue to lick up your shaft, teasing the cockhead, rimming it, and licking it all over with her saliva, and finally putting it all in her mouth, slowly and quickening, pumping it in and out till u explode and she swallows your cum. Perfect! Hehe