Tourguide, you are obviously male.
Which part of "no" you have trouble with?
She say "I'd rather leave than wear corset." He not talk to her for a week now. What's up with that? He acting like big baby because he not getting his way, ya?
Pam is right: "You then have to decide how important it is to your relationship."

He should talk to her, yes, but never mind corset stuff. He should talk to her, make peace, and get back to REAL relationship. There are things I will not do, there are things you will not do, there are things he will not do, so why should she be any different?
This boy on right track for losing his woman.

You say: "This is why people set limits. It gives them and their partners something to work on in the future. "
Right! In future!
He want her to wear corset, he should back off. Let her come to it on her own. She will know if it important to him, she will choose for herself.

You also say: "Yes, respect is a must in a relationship, even if not as a slut and a slave, then at least as a human being. "
If you respect soman, you never ever call her a slut, except in play and only if that okay with her. You call your wife or girlfriend a slut in public, what that say about you?

Pah! you need good kick in the pants!