I was thinking back to my last gf and something she noticed and said a few times to the effect of - "it's cute how you measure things based off of your penis." And what I've noticed is that, basically, in many ways I do. In the same way that a person who uses a ruler a lot, or counts how many steps they take to walk somewhere, would know the size of a ruler or the size of their foot and use that to compare to anything they encountered, I seem to use my hand relative to my penis to compare the length of things. For example, I know my hand is ~7.5" long. So, when measuring my penis, I can take a pretty fast estimate of the length of my penis that overreaches the length of my hand. In the same way, anything a little less than my hand size or greater than, say from about 7-9.5", I can pretty accurately measure based on the fact that I have compared my hand size to my penis size. I thought her comment was pretty cute, and also pretty observant (so much so that I didn't even realize that I did that until it was mentioned), and was wondering if any of you have noticed your bfs or if any of you have used similar relative measuring techniques?