I haven't been sucked off that many times for this reason, i think. One girl I dated, in particular, was all about it and she proactively gave me one early on in our first date. Other times I've gotten it- it was because I awkwardly asked for it, and most of them wouldn't do it for very long because it was too big for their mouth. From a guy's perspective- that's very understandable. Why would you put something in your mouth that's too big? However, some do like it, including the one example I included. How many girls that you know love sucking off a large penis? And is it the truth that most girls don't like putting their mouth on something too big for it?