Maybe its because of the constant handling of the penis.
Might be similar to masturbating all week and then your girlfriend comes over and you have a hard time finishing.
The sensitivity of the hand is different than the vagina. The hand is courser than the walls of the vagina, as well as
knowing just how to handle it with the hand over years of mstbting.
So with all of the jelging and pumping and hanging and mstrtbting the penis is used to a certain friction which the vagina doesn’t offer.
I have noticed sometimes if I cant get off through intercourse(I have been known to take sometimes a half an hour even before PEing)
and sometimes I cant with a condom on, I put it between the boobs and in about 3 minutes Im done. Thats because I am applying
manual pressure.
So I would bet money on if someone were to not do anything including mastrbting for lets just say a month, the fireworks would set off
real fast. So then maybe its just letting the penis rest for awhile to re-sensitize it. And using baby oil or some other cream.
The other theory could be that by growing the penis the nerves and blood vessels are stretched as well. So now maybe there aren’t
enough of them for the size or they have not fully caught up yet.
For me, the intensity and sensitivity are the same or better since PEing. But I will be watching for this and may be a reason I stop at some point.