Plumber: "Alright, ma'am your sink is all fixed, that will be $
189"
Single mom: "Oh my, that's a little high, can I have the
single mom discount?"
Plumber: "The what?"
Single mom: *Starts to stroke plumbers cock*
Plumber: "Ohh yeaa that feels nice"
...The Single mom and the plumber engage in sexual activity for about an hour...
Plumber: *Putting his clothes back on* "Well ma'am, your grand total comes to $15"
Single mom: "Now that sounds reasonable!"