I'm siding with the Tech Goddess. Although for most people its a case of "To Each His Own" cumming on a woman is dominating and also essentially "Marking" the woman as property of the male. But to anyone who finds this practice wrong there are many women who have submissive tendencies who want to be cum on. It turns them on to be marked by their selected dominant male.
I add one twist to the practice: After I cum on a woman I like to spread the cum over her body as she writhes in delight.
Rookie Scribe