We've had a couple sisters get a pearl drop candlepassing. I think it's a great way for girls dating non-greeks to get involved in the whole lavaliering thing.
And sometimes guys will surprise you and get how much it means to you.
For one of my sisters, her boyfriend knew about candlepassings since she'd mention when someone he knew had one. He asked what it was and she told him the general idea of what happens (everyone's pretty familiar with candlepassings, and they're not really secret, at least not on my campus). So that led to conversation about what he could get her since he wasn't greek, and she told him about the pearl drop pendant. He bought her one, and she had her candlepassing. Not the most exciting story, but it was the first time he was really supportive of her being greek, so it meant a lot to her.