Oh get over what people want to call their junk. There's probably some trans man out there who personally uses "front hole" and cringes whenever someone says "vagina" who would appreciate that someone is making an effort. Obviously some trans men don't like calling the thing a vagina or someone like me wouldn't know the phrase "front hole" doesn't mean someone's mouth. Geez, you people.

And while you might want to confirm that the policy applies to the specific item you're purchasing, if you order a fuck harness from Mr S in San Francisco it can be returned/exchanged, according to their website. And if you can make it into the store, not only can you try it on as it's meant to be worn, they will probably MORE than happy to help you.