And the next time I plan to go out, I am going to start answering his questions the way he answers mine. He always says "That is my private business." So my whereabouts and activities need to be my private business.
Bravo! Sauce for the gander, sauce for the goose!
Plus - should you be going out in a hot dress wearing new perfume and nice makeup - he can wonder about where you might be going and who you might be meeting. It is a good thing for them to think about whether you might interest another man - sometimes that's when their brains snap back into reality, so better for him to experience that NOW, than when you are long gone and into some other guy.
I'm not suggesting you lie - just give the APPEARANCE (later totally deniable) that you MIGHT be out there available to other men. And if a nice bouquet of flowers mysteriously appears in your living room - and if he asks about them, you say "Oh, they're from a "friend" and leave it at that - so much the better