It's almost as if she is putting an exclamation mark on the fact that she expects to keep change like that as some kind of unwritten law of boyfriend/girlfriend relationships.

 
In any case, you did get your change back later with interest, and that's the important thing.

Love you stories!  And I'm quite jelly, wish their were some asian spinners here in  Pussy Siberia!

Met a gal for the first time a couple weeks ago at her place, 24yo brunette, slim, white. Completely disorganized, her place was a mess, but she was cuter than I expected and eager to please. She did a good job and clearly wanted to make a good first impression in bed.

 
I gave her $$$, as we agreed via text, in hundreds. She then asked me if I had any fifties. Stupid me thought she preferred smaller bills and wanted me to make change for her. So I told her I had some fifties in my vehicle and I'd go get them. So she asked if I could make it 350. Before I could object to the price hike, she just blurted out, "It's ok. I've got fifties laying around here somewhere, but who the hell knows where? Hahaha!"  

 
So she needs or wants the money, probably didn't even remember what we agreed to, but when I said I'd need to go out to my vehicle, she just laughs it off and admits she's so bad with cash that random 50s might be mixed in with any number of the piles of paper, laundry, dishes, stuffed animals, etc. that lay everywhere. I bet my 300 was gone by morning, either spent or lost among the piles.

 
Not as amusing as HTC's "68 cents" story, but yet another example of piss poor money management skills.

Simple math can be useful.. I can't tell you have many times I've seen odd rates for some pros: $350/hr and $600/90 minutes, for example.  
But the nice part of Herb's story is that you can get a lot of gratitude for a small gesture.