My wife did some work for a guy in his late 60s - a very elegant and sophisticated man, a real gentleman. After the job was over, he took her to a very expensive restaurant - one where she had to dress smartly to fit in. She wore a very stylish little back dress over stockings, suspenders, and lacy black underwear.
After several glasses of expensive champagne, he told her how much he'd enjoyed working with her, and now that the job was over he could confess that he had also enjoyed the way that she looked and the way she moved, and said how nice it was to be able to spend some time with her outside of a work environment.
Long story short, her little black dress ended up on the floor of his hotel room, together with her bra and panties. She said he had remarkable stamina for a man his age - plus he had obviously built up some expertise over the years!