Talk to Urologist on Pre Mature Ejaculation Leaks, Boner And Small Penis Complex

I have been exposed to pornography and explicit content and due to that I have had habit of masturbation. Although everything is normal no pain or anything but I feel my penis is not really long and sometimes when I see some 18+ content it leaks pre semen and its very difficult to control as I get wet by small dirty thoughts how to overcome this challlenge and about penis size how should I be confident or check if my size is fine and I am fertile