The tutor was explaining to her nurse students, about the three most important things of a male body are that these were:
His heart, his brain and his Pen!s.
A few months later at the final exam's when one got asked "what was the three most important things of a male anatomy.
She stood up and said: His Brain, his Heart and his, er um er, of what was it now, I had it on the tip of my tongue this morning too :D
:o :o :P :P