Put your money in an envelope.Maybe a little extra for a tip.Give the donation before the fun starts and excuse yourself to the restroom,this gives her a chance to takea peek.I Always leave my "walking" around money in my vehicle.This prevents me from over spending on up sell charges,and the possibility of running into someone with sticky fingers.

As far as what happened with your latest,she'll either believe your story or won't.Not much you can do about it.

I'm sure that some guys wouldn't have done as much. Though I've never shorted a lady, intentionally or not, I did forget the tip one time, and felt terrible about it. This lady went above and beyond, and deserved a sizeable tip. I've seen her again, and taken care of it.

Years ago, I was a regular at Nite Lites (most the the older guys here will remember that really wonderful place).  Usually the fee was paid after the service, and one night I just forgot to pay the gal and left.  I got home, and about a hour later, I remembered that I forgot to leave the fee. I got back in my car, drove back to town, walked up the stairs, found my "date" and, with honest apologies, paid her.  She was so suprised and grateful that I came back, she invited me in for a great freebee.  I loved that place.

A few years ago I had seen a favorite of mine and she was not one to expect the donation up front and would never even acknowledge the presence of an envelope.  I had left once with the envelope in my back pocket having totally forgotten about it.  She never called but when I got home I suddenly realized my mistake and sent her a text msg.  Made up for it on my next visit to her plus some.  What a lady!