Gee whiz, wish I’d kept track of size as I was growing up, what a database!
As a youngster growing up in the great plains, not much activity but hunting and … masturbating. Daily for me (I wasn’t interested in sheep, lol). I have ended up now with 7 5/8 x 5 1/4. As to features, my head is big (!), so’s my ego *laughs*.
If I were to guess, I’d say that vascular dilation is pretty much always a good thing.
On the other hand, I mean another idea, I’m right handed, my left just doesn’t have the rhythm. Sometimes my hands were rough and chapped from weather, dirt, etc and my thumb joint would rub through the skin just below the head, ouch! had to stop until it healed.
Cold weather made it shrink big time, uh, enormously, I mean into this teeny weenie.
Masturbation also changed the sensitivity settings in junior so vaginal sex had to be practiced regularly and with great ardor, did I mention repeatedly? to get the longevity necessary for simultaneous orgasms. Wow! Got pretty good at that he humbly admits. During that time, I didn’t mast. What happens is that the head gets super sensitive so just air flow around it, as in masturbation, is a stimulating sensation. Vaginal use is much different in that the head is so enveloped by the wonderful irregularities and muscle squeezes of your partner.
I need to cool off now.