Curviest, I dated someone who had about a one to two inch penis. I was seventeen so stayed with him a bit longer than I would have now, because he was also handsome, blah, blah. I split up with him when he told me he liked going out with me because I wasn't beautiful.
I've also split up with a guy who told me he had an average size penis which was only about three inches, maybe four on the hard. I'm not an unkind size queen, but he was a dick in all manner of ways and I was having to put up with him for a while for reasons that are dull. So, the guy when I was seventeen, I never pointed out that he had a teeny weeny, because that would be cruel and I guessed he pretty much knew that anyway (he was 25 and not virginal) (Oh and I once watched TV while he was at it, because I was bored and a Midsummer's Night Tube was on the TV). But Mr "I have an average sized Penis" was a nightmare in so many ways. On the last day I Spent with him, he told me he would go down on me, which I hoped would be better than the rest of it had been, but first I had to go and wash my "flower" - he called it that. I'd had a shower already, I wasn't bloody dirty. At this point I was so enraged with every little thing about him that I told him he did not have an average size dick, that it was bloody tiny and he had no idea what to do with it anyway.
I dumped another chap - when I was 19 - because he told me he loved my big thighs. We were at a party, I walked away from him, went into another room and smoked dope for the first time with other people and never spoke to him again. He cried and people told me I was cruel, maybe I was, but seriously! I also weighed about seven and a half stone at the time (I'm 5'2) and I was tiny.
Dumped yet another boyfriend in my still a virgin days because he told me that the drop waist dress I was wearing would look better with a belt around the waist.
Reading back, I was really quite horrid in my teens! Mr Average Penis was in my 30s though, and if anyone ever deserved to be told, it was him.