Do you use Bluetooth?

I accidentally activated Bluetooth on my phone this morning, and while disabling it, I started to question myself.

When was the last time you actually used anything Bluetooth related?

I don't have any wireless speakers, don't use a wireless headset and when I'm transferring files between my PC and the phone, I'm generally wired up.

Do you use Bluetooth regularly? If so, what for? Am I missing out?