I'm thinking of stealing my roommate's body wash. You think that's a good idea?
Why do you want to do that?
My roommate always takes my body wash by accident. I think that it is fair for me to take his so that I won't have to buy a new one for a while.
You should communicate this and avoid stealing their stuff. Two wrongs do not make a right.
I will continue to do this and just not tell my roommate. I will also cover their toothbrush since I have to use it more often.
You're telling me you're frustrated with him using your body wash, but you want to do the same thing to him. Just tell him how to rectify the situation.