There’s basically a solution termed the Love Is Art Kit that lets you make wall paintings out of your private penile prowess. It’s termed "nocturnal penile tumescence" and it’s fully pure, not purposeful.
Now, I imagine the true difficulty I’m facing, after examining Jeff’s remarks and additional of Hal’s, is that I’m making use of a phrase that is, however to some degree accurate in its way centered on my conception of what a genre appears.