For visitors who tend to look past the clothes to the people and things, the silliest the question is about art, the better it is.
A paraprosdokian is a figure of drawing with life model posing as a funny sentence.
The opposing pair of figurativeness vs. abstraction
Would you persuade, speak of interest, not of Reason.
Works of art signal the possibility of the non-existent; their reality testifies to the feasibility of the unreal, the possible: the wise man sits on the hole in his Sierpinsky carpet.