A woman's ass with a flower painted on it can be construed either way - as art or porn - depending on how offended you want to be. By definition, the image is not "the depiction of erotic behavior intended to cause sexual excitement" (Merriam-Webster).

It doesn't arouse sexual excitement in me, yet the image is pleasing to view.

Who's fault is it if a person get aroused? The person's own self? Isn't that why priest's go celibate? On the flip side, isn't it misguided for the Afghani religious police (the Ministry for the Promotion of Virtue and the Prevention of Vice) to beat a woman with lengths of steel cable for wearing white socks ("fashionable, omamental, tight and charming clothes" are banned)?

I can't wait to see Trick-or-Treater. I'll wear my sexyist, tightest-fitting white socks.