Originally Posted by RedAndTall
I explain it like this: I don't mind letting a friend borrow my second motorcycle and go riding with me along the roads. but I never let them take one on on their own for the night without me along for the ride...
That is a really bad analogy. While you own your motorcycle and can decide what to do with it, you don't own you wife. When you say things like that it sounds like you're treating her like an object.
It also sounds like you don't trust her. You say it's her possible other partners you don't trust, but eventually it's your wife's decision whether she breaks the boundaries or not. You make it sound like she could be easily persuaded into anything and that reflects a trust issue towards her, not really anyone else.