The mathematics of sex

Long version

Look for her tan line.
Subtract her pants.
Stack her on the bed.
Divide her legs.
Calculate the distance.
Arc her back.
Add your length.
Function properly.
Provide constant movement.
Give her a square root.
Turn her over for a reverse Polish notion.
Gradiently increase the integer.
Round the remainder.
Fill her pi.
Hope she doesn't multiply.
Log the event.
Sine on the dotted line.
Get her to cosine.
Profit from the experience.
Base the result on an exponent.

Short version

Add two people,
Subtract their clothes,
Divide the legs,
And multiply!