Anal masturbating

One of my favorites with gay sex is what I refer to as anal masturbating. I love it when my sphincter muscles are tightly hugging my boyfriend's horny cock. He likes it a whole lot too, especially when I fondle his heavy, cum filled balls as he moves the head of his swollen manhood slowly in and out, just the first two to three inches. This gets the blood really engorged in his glans to better rub against my prostate. Like a domino effect, my horny cock gets nice and hard as he rubs it and fondles my balls. It creates an incredibly intense orgasm for us when we ejaculate together. He likes feeling and watching me cum while feeling my contracting sphincter muscles squeeze his hot cum out of his cock.