I had one ages ago where a newbie client asked for something specific. The email conversation went something like...
"I'd like to try DATT, can you help?"
"Try what?"
"DATT" n
"Explain?"
"Dining at the toes"
"Eh? What are you talking about?"
"I want you to put me over your knee and spank me"
"Why the **** did you not just say that in the first place"

To this day, no one has referred to spanking as dining at the toes, feck knows where he got that from.