Prof of Computer Science:
A kiss is a few bits of love compiled into a byte.
Prof of Physics:
A kiss is the contraction of mouth due to the expansion of the heart.
Prof of Dentistry:
A kiss is infectious and antiseptic.
Prof of Accountancy:
A kiss is a credit because it is profi table when returned.
Prof of Economics:
A kiss is that thing for which the demand is higher than the supply.
Prof of Engineering:
Uh, what? I’m not familiar with that term.