NIPPLE-ing effect

Brief in-between one of those soporific operations class (in-fact most of the first lectures of the day have been degenerated to HBL (Heads behind Laptops) periods); as all of us were amidst completing the much-required 4 hours of sleep/day; and i was doing the usual nodding position (Eyes half closed and brains already drifted into sleep) and then suddenly everyone awakes as the prof says :

"NIPPLES"

Naturally, for all of us sex-educated (read perverted) minds; this was like a caffine implant and right it shot all of us out of our stupor.... and then all of the sudden, the prof says, "let me draw a picture of the Nipple for all non-engineers"
Suddenly Operations became such a awe-inspiring subject; everyone closed their laptops and for the first time in their lives drawed their eyes upon the Black-board avowing their renewed interest for SCM.

More about NIPPLES ;)