I'm sure that none of the moderators are too concerned about the presence of a baby in a fine art painting. However, the problem of children in pics was a recurring one. Were they an oversight? were they put there deliberately? The days of Lewis Carroll taking erotic photographs of Alice and nude ones of her sister are long gone. Today he would probably be in prison.
To simplify matters I.M. introduced the "no minors" depicted anywhere on the site rule some years ago and that is the rule we have stuck to.