A similar one is the plumber plot from the 1970s and early 1980s.
"Hello, my sink is clogged".
"OK, I'll be right there."
"Great!!!! I'll be waiting for you."
Door bell rings
"Before I fix your sink I need to drain my big pipe in your sweet ass!!!"
"WOW, that pipe is huge!"
Moans and groans for 20 minutes or so, with a tacky porn sound track playing in the background
"Um, now where is this clogged sink?"
"Sorry, I just needed to get laid. My sink is fine."
"Well, call me the next time you sink is clogged. I'm sure you will enjoy the service as much as you did today."
Sly wink and naughty grin