Hi, ever since i was little i have a problem with bumps on my upper arms and inner thighs, no big deal i was told that they were ingrown hairs so i didn't worry, seeing how i play sports, but when i turned 13 i believe i noticed that on the penis its self bumps began to appear, now as a 13 year old i had no source of sexual contact yet to this day they seem to get worse and then some times fade. Iv been straining my self on ideas, i don't know what to do, or what it is. Can such things because from sharing towels or clothes? please reply with help