Quote - Those flying rugrats you see in Renaissance art are actually 'Putti' a motif from ancient Greco-Roman art, often associated with eroticism, leisure, playfulness and the goddess Aphrodite.

Quote - The main reason they wound up in that era's artwork is because some Renaissance artists 'rediscovered' them and then had a blast secretly thumbing their noses at their foolish patrons by adding them to straight laced religious works.

You know nothing about Greece, Rome, middle-age and rennassaince.
Not only celestial flying creatures, statues and paintings are full of normal human children and all are nude, do you know why?
Sex neither genitals were not considered as something shameful or forbiden, so nothing wrong with nudity. Then why children and nude?
A greek concept was that civilization brought decadence to mankind and clothes are a product and symbol of civilization.
A children was considered innocent and not contaminated yet, they represent purity and of course you cannot represent something pure with the product of decadence, so children must be represented nude!!!
Were only the Protestants and Puritans that turned human body into something shameful and sinful and of course the end of art and much more things, after all, art is forbiden by the Bible read textually. 

Stupidity also evolves!