Non-horsey friend "What sport do you participate in?"
Me, "Oh, I ride horses, and mess around with reining."
A few tipical responses to this would be:
"You like to mess with the reins?"
"Isn't that like the things that go in their mouths?"
"WTH is that?"
Once I answerd with just, 'I rein', which a clever fellow replied without missing a beat 'over which domain?'