Keyholder Question

Good morning everyone.

Hub and I were discussing a friend of his who really enjoys being chaste, even though he doesn’t currently have a keyholder (though he has had one before; it wasn’t his partner). By the way, this is actually the only other chaste man I know personally! Even though this fellow hasn’t explicitly asked yet, my husband brought up the idea of me holding his key until he finds someone permanent. He lives about four hours away by car, and since I’ve only met him once in person, this would definitely be a remote arrangement.

I’d love to hear what you all think. Do you feel that agreeing to hold another man’s key purely out of goodwill makes me a target for unrequited feelings? I believe I need pretty clear boundaries before saying yes.