The approach of ones sexual partener from a rear entry position. This differs from the conventional method, however, in that male 'takes a knee' to position himself behind his partener in a fashion resembling the stance of Captain Morgan, spokesperson of the popular spiced rum.
To approach ones sexual partner from the rear position; the male takes a knee to position himself behind ones partner in a manner similar to the stance of Captain Morgan, the mascot of spiced rum.
I saw a dude this morning who always comes into the office standing at the computers like a pirate... we call him Captain Morgan!