Husband cums to quick

Hey guys my husband had a traumatic even when he was a teenager where he developed a hydroseal and had to have testicular surgery even. Unfortunately he says he's super sensitive and can't last more than 15 min because of it. and if he can last longer it's not incredibly satisfying coz he's concentrating so hard not to think about sex to last longer that it's very disconnected. Anyone have any ideas that their significant others have done to last longer?