I see quite a lot of guys with this issue, some only go partially back and some not at all with just a small hole to pee and cum through.
From my perspective I find it uncomfortable giving oral with a foreskin like this as in my mind it never feels clean, there is that warm damp pocket between the foreskin and the head that can't get washed properly especially if it can't be retracted when flaccid.
Its great to see lots of good advice on stretching and on circumcision, I couldn't find if anyone has mentioned that you can have what is called a partial circumcision where less that half the foreskin is removed, basically just the tight band leaving you with enough to still give the sensation of skin moving over the head during sex, wanking, oral etc
I really like an uncircumcised cock its loads of fun to play with orally when the foreskin works as intended.