You know, the bell-end part of the penis that's usually covered by foreskin. When its hard.
The other day I've had another one of these, suppose I've had in total 2 maybe 3 or 4 that I can think of over the last 6 years I've been escorting.
Are these rare or common? I'm talking like; at first it looks normal and then after a while "it" feels really nice yet a bit too big inside the vagina... then you feel it with your hand or seeing it after some sex before he has cum, the head is huge compared to the shaft, its like a swollen mushroom much more so than normal, maybe double inside than when it first went inside?

Has anyone else known this happen?

Sure it feels like he gets bigger after a while of being inside but that's normal sometimes, just not the glans part. It feels nice but also too big except when they get behind for doggy or on top for missionary.