This is a really interesting artistic choice. On the previous page, we saw this man brutally rape a young teenager (she’s between his legs here). And here we can see his erection in shadow. I don’t know that we needed to see the brutalization in the first place, but showing the erection is a bit much.

(Heavy Metal #305 2021 – Page 92 Maiden by Sears, Sears and Fella)