[M4A] How big is too big?

I'm looking for a scenario where we're friends or roommates, and as we're drinking one night, you make a confession about a certain problem you have...

Your cock is so big, you've never found a partner that could take it balls deep. I'm not buying it, and after a little back and forth, I convince you to drop trousers and prove it. When its flaccid, it's quite impressive, but nothing I haven't dealt with before. The alcohol gets the better of me, and I suggest that I could be the first to take the whole thing.

You agree, but when I start warming you up, I learn that you're quite the grower, and this may be more of a challenge than I bargained for...

From there, I'd like you to start of gentle and apprehensive, but grow more rough and dominant as you either lose patience or just get overwhelmed with excitement. I said I was gonna take you balls deep, and you're gonna make an honest man out of me.

I can play as a masculine or feminine man, and my only limits are toilet play.