‘Don’t Use My Toothbrush’ Leo and Rebecca Buzz Question

What's mine is yours, right? Well, hold on!; not too quick with that thought.
Leo and Rebecca Buzz Question 'Please DON'T Use My Toothbrush'..Me and My MAN just took a BIG step and moved in together BUT...I've noticed several things that BOTHER ME. He uses my ISH!!! I've caught him using my razor, shampoo and YES MY TOOTHBRUSH!!! He's very sensitive guy and I don't want to hurt his feelings BUT NOPE not having this. Any suggestions?