What does a cat, a woman, and a shower have in common?

You might remember the stray kitten we took in, well, he had a small surgery. We took him to the vet for neutering and shots. While at the vet we were guilted into purchasing pain medicine, although other vets we contacted said it wasn't really necessary. The vet said to expect him to be groggy and a little less active.
AND THEN...
We gave the cat the pain meds and he went BISERK! He ran into the walls, hit his head on things, ran all over the house--jumping, leaping, and attacking all in his wake. Hence, we discontinued the meds.

So this morning I was in the a shower when I heard the door open to the bathroom. Figured it was sweet hubby, so no worries. Out of the corner of my eye I saw the cat. YES the cat! He opened the door! And then he proceeded to watch me shower thru the clear shower liner. Wierd, but not an emergency I continued on. Next thing I know he jumps up hits me, but the shower liner pushes back. Crazy cat gets up and walks off like he meant for that to happen.

Remind me again--why do i have a cat?!?