Cold glans from extender
I recently purchased the vac extender 4.1. At first, I wore it for only 15 minutes to test out the vacuum function and to see how it felt. No pain, felt great. The next day, I wore it for 45 minutes and noticed that when I took it off, the portion of my penis that was covered with the vacuum cone and the suction cup (Basically the parts that are being pulled by the cone,sleeve, and cup) was much cooler than the base of the penis. It definitely felt cold. There was no pain and I just warmed it up under a warm shower for 5 minutes and all was grand.
My questions are
1) is the penis supposed to get cold like that? (When people are suggesting 4-6 hours of use a day, I only wore it for 45 mins and the penis got cooler)
2) how to avoid this if needed?
3) is there need to remove the vacuum and extender after an hour use? Or is there a way to get blood into the penis without removing the system?