What is a kiss?
Prof. of Algebra: a kiss is two divided by nothing.
Prof. of Geometry: a kiss is the shortest distance between two entities.
Prof. of Physics: a kiss is the contraction of the mouth to compensate for the expansion of the heart.
Prof. of Chemistry: a kiss is the reaction of the interaction between two hearts.
Prof. of Pathology: a kiss is the interchange of salivary bacteria.
Prof. of Physiology: a kiss is the juxtaposition of two orbicularis oris muscles in the state of contraction.
Prof. of Accountancy: a kiss is an investment because it is profitable when returned.
Prof. of Economics: a kiss is that thing for which demand is higher than supply.
Prof. of Statistics: a kiss is an event whose probability depends on the vital statistics of 36-24-36
Prof. of Engineering: What is a kiss?