I dunno, but for me I don't really care if the author put the pin-ups. I mean they ain't real, so if you have a sexual feeling when looking at them those feelings are mostly superficial. But that's what I think, and thank you and have a good day.
TL;DR: What I'm saying is those characters a fictional and when you have a weird feeling looking at the pin-ups they're superficial, but that's my opinion. Have a good day