He's not on this board, but I have a married FWB's that is my only MM experience thus far. Took my virginity in almost all respects and is like the Energizer Bunny in that he lasts for close to an hour and recovers in only a few minutes. He is quite a challenge!
I have measured and he is a true 8½ x 6¾" and that is from pelvis to tip - not asshole to tip as most men seem to measure! His ass is so sweet to rim. He almost has to pry me away to turn me around and hook my ankles over his elbows or shoulders.