You're not wrong. A divorce can take anywhere from 3 months to a year to finalize. You shouldn't do anything you aren't ready for, and he shouldn't be pressuring you. By your own admission, you don't trust him completely, or you wouldn't be skittish. Find out exactly what kind of committment he's talking about before you agree to anything. There's more than one meaning or type of collar, such as a collar of consideration, training collar and slave collar, each with their own level of comittment or expectation. The time to negotiate terms is now. If your terms or his terms aren't acceptable, no little strip of leather is going to fix anything.