I recently began seeing this girl in early January and we started having sex in February. Since then I went from having sex 6 times in my life to now probably over 200. We had sex probably on average 2-3 times a day, and I obviously enjoyed witnesses my sexual skills develop, to the point that I made her cum almost every time we fucked. But thats just backstory to my question. Recently I measured my cock for the first time since being in this sexual relationship, and I was able to notice small improvements in both length and girth. If I were to estimate I would say roughly .2" in each. I'm 20 years old and haven't noticed any growth in the last 4 years or so. So this makes me wonder if my cock grew some just from having consistent sex and thus being hard for a lot longer time than without it. Or is it just late set natural growth due to age?