If Bill Murray hadn't rejected my script, "Spaghetti", back in '77, we'd be having a different conversation right now. 

Once is plenty enough.

 Captain could've 'done that' to Tennille ten more times, for all I care, so long as they wrote songs about it one less time.

 She asked if there was anthracite coal in the valley. I nodded, inviting her to explore mein shaft.