Matt wears a chastity belt/device when he's out Daredeviling to avoid becoming turned on by all the blood/gore/violence/sadism.

But that doesn't prevent him from coming home and taking it off and coming over and over again to the memories of what he's done.

+100 if someone tries to hit Daredevil in the groin and screams in pain because slamming your foot/fist into steel hurts like fuck