What he said!
No trust = no relationship, simples!
What a load of bull ****, maybe the op just doesn't like the idea of men trying to get into his girlfriends knickers! think about it? Does that rest easy in your mind some skid mark trying it on with your girlfriend/wife?

My bed post is full of notches from wives of "Content Relationships". Why do you think she's content? Because she's getting a good roasting elsewhere and then content in cooking your sunday dinner.