I do it cause I get tired of the sensitvity issue. However I was told by another guy who is a foreskin expert that he just by lube the area of your foreskin after cleansing will help with being sensitivity.
I learned alot of dealing with foreskin exspecially with sex and j/o. No baby oil because it's grainy, using coco butter because it won't shaft my foreskin. Not using water based lube because when it dries up, I will feel pain with each thrust.
At one point I wanted to get it cut, but alot of my friends who are cut tells me they wish they had thier foreskin.