My observation, my opinion.. The penis, like the scrotum are thermal reactive - they respond to external temperature in an attempt to regulate internal temperature. Before I got serious about PE my unit was a serious cold turtler. The most extreme cases were after long, winter bike rides where it has little protection and significant exposure. After a ride he was tiny, withdrawn, and cold. Now that I’ve has significant PE gains, and I’ve adopted the never-let-it-turtle mantra, my unit is unable to react as extreme in these extreme conditions.
BUT, to your point, I’ve found that my unit is overall less thermally reactive now - no turtling. Add to this the added flaccid hang and the results are more exposed tissue, further from the body - a cold penis. Even on moderate weather bike rides, he’s out in the wind and get’s really cold. I’ve also had to find new ways to tuck him to accommodate the increased size with my desire to get low in the drops. BPP - big penis problems. ;-)
This, along with my overall belief in maintaining circulation and expansion during healing, has me constantly massaging throughout the day. I’ve actually gotten pretty good and holding a stealth stretch through the pockets of my fleece pants. At least I think it’s stealth.. I haven’t been arrested as a pervert yet. :)