The exceedingly uncomfortable and inconvenient bent-far-forward position that you are forced to assume when sitting on the toilet and trying to urinate, but you have a "stubborn" boner that refuses to "relax", and so you have to awkwardly lean way over with your head down between your knees in order to rotate your abdomen far enough to get the tip of Mr. Happy down into the bowl.
It's a good idea to take a good long whiz **before** "getting it on hot 'n' heavy" with a luscious chick --- especially if you also take a Viagra/Cialis pill prior to said bouncy-bouncy --- to avoid any unexpected stiffy-squats.