[Should I wear a chastity belt to stop masturbation?]
Maybe not a chastity belt (not very practical/hygienic) but there are other devices you can get. My fiance has one, it goes round the base of his xxxxx and just sits there until he gets aroused, then it has teeth that stick in and hurt him so he turns his mind to something else. Plus, for obvious reasons it can't be removed by a guy who's in that condition.
Personally I think it's terrible that he has to wear that thing, it hurts him a lot at times and he bleeds, but we're sharing a home together now and not married and we've promised each other nothing immoral will happen and he feels it's the only way he can keep on the right path