at 7.5 x 6.5, I have had a few struggle to take it. one gf was super tight, fairly inexperienced, and it took a week or so before I got all the way in her. most partners find that mounting me is the best way. let her control the rate of entry. my wife of many years usually mounts me 90% of the time. she has told me more than once.."honey, you have a big, big dick. has to be worked in slow." I didn't argue. with her on top, instead of me on top, I get to look, fondle, and kiss her magnificent breasts.
I have never made a woman bleed. they will stop before that happens. but I have induced multiple orgasms with a few women, including the super tight one mentioned above. she was immobilized for a good 10 minutes a couple times. legs quivering, shaking. she was cumming often enough that her eyes were fluttering. when I do that to my wife, she is unable to talk, or do anything but shake. she says she cums so hard and often she almost passes out. she usually goes to sleep shortly after, but the next morning....she wants more.