Prof. of Economics: Kiss is that thing for which the demand is aways higher than the supply.

Prof. Of Accountancy: Kiss is a credit because it is profitable when returned.

Prof. Of Algebra: Kiss is infinity because two divided by nothing.

Prof. Of Geometry: Kiss is the shortest distance between two lips.

Prof. Of Physics: Kiss is the contraction of mouth due to the expansion of the heart.

Prof. Of Chemistry: Kiss is the reaction of the interaction between two hearts.

Prof. Of Zoology: Kiss is the interchange of salivary bacteria.

Prof. Of Physiology: Kiss is the juxtaposition of two orbicularisoris muscles in the state of contraction.

Prof. Of Dentistry: Kiss is infectious and antiseptic.

Prof. Of Philosophy: Kiss is the persecution for the child, ecstasy for the youth and homage for the old.

Prof. Of English: Kiss is a noun that is used as a conjunction, it is more common than proper, it is spoken in the plural and it is applicable to all.

Prof. Of Architecture: Kiss is a process which builds a solid bond between the two dynamic objects.

Prof. Of Comp.Science: What is a kiss? It seems to be an undefined variable.