I'm circumcised but my cut is very loose. Frenulum mostly there still.
Not too much time is needed to get me to blow in my wife's mouth, but she can't do it like she used to. Used to be able to deepthroat me easily, almost all of me, and I used to hold off cumming on purpose so she could keep sucking because she liked deepthroating me so much, it was a major accomplishment for her, something she never once dreamed of doing on me. I usually lasted 10 minutes at a bare minimum just before intercourse. When she planned to give me a bj to completion it could take sometimes 15 minutes.
After her two rounds of oral cancer, she can barely finish me, she can barely take me in to my circ scar, which is where I need her lips to pass over just a mm in order to trigger the nerves that get me to orgasm. I'll usually abstain from cumming a few days to make it easier for me to get off in under 5 minutes for her, she appreciates it! She does what she can and uses her hand a lot more now than ever. She might get me to ejaculate in her mouth only once a year now, maybe twice if I'm really lucky. Used to suck me off all the time, several times a month, sometimes after a long bout of intercourse she'd finish me in her mouth. Not anymore

Permanent dry mouth, partial reconstructed tongue, and atrophied jaw = difficult fellatio.
God bless you men that get regular, amazing, wet sloppy blowjobs! And to those that give them, you drive my fantasies, whether men or women, its an art and a special thing to share between two people (one has to have a penis of course lol)!