I have never had sex, but my penis has had contact with a
hand. There are bout 4 small reddish
bumps, one larger than the other 3,
on the back
of my penis under the head. These bumps are fairly hard. On several occasions i have tried to get to the root of these bumps and basically the way i do this is by pulling at the bumps and when i pull at them, pieces of white stringy material come out which i feel maybe skin.