This is a sensitive subject that a lot of Americans, especially men, are not open to, so kudos to the OP for even posting! Believe it or not, about 70-80% of the rest of the world keeps their foreskin. Circumcision is an American thing, it was started to try and curb masturbation. And we all know how well that worked. lol  

Anyway, the foreskin has a purpose. It keeps the glans moist, which increases sensitivity. Versus no foreskin, meaning the glans dries out and gets chafed/calloused, decreasing sensitivity -> hello ED/PE issues! There are about 20-30k nerve endings in the foreskin, it's the exact same piece of tissue as the clitoral hood. So think about what your clit would feel like without that covering, and there you go. The foreskin also naturally lubricates the glans, which also means that less lube is needed during sex. Having been in two relationships with partners with intact penises, the sex feels sooooo much better than with a circumcised penis. It's different, it's hard to explain, it's just better.  

While restoration won't restore the nerve endings, it will help increase sensitivity of the glan since it will be protected once again. Also, for some men, it becomes a bodily integrity issue, they might be angry this was done to them without their consent as infants as it it not medically necessary and is considered cosmetic surgery. We don't do it to our girls (it's illegal actually), so why are our boys different?  

Obviously I am pro-foreskin and am always happy to see one. Americans think it looks funny but to the rest of the world, they think American's looks funny. Ask some European friends what they think about circumcision, that's eye opening.  

Kudos to the OP for restoring, I wish him lots of pleasure on his journey!