Re: Please help me!
Your bell end (glans) is sensitive because it hasn't been exposed before. Just lightly, without causing pain, tug back on your foreskin in the shower or whatever. Hold it back in the tugged position for maybe 30 seconds and then release. If the problem is that the hole is too small to get your glans/bell end past, you might try stretching with your fingers.
To desensitize the penis head, just run water on it. Do this at whatever rate you can manage - start with cupping water in your hand and pouring it over if you must. Eventually, it will be desensitized enough where it is still quite sensitive, but not in a painful way.
The stuff that can be wiped away is just dead skin cells.
"I don't believe in magic. But I do believe in interpreting coincidence exactly the way you want to." -Sherman Alexie