This is the second idea
I had about an article I read about how sex between women was considered 'not real sex' some centuries ago (and I'm afraid that nowadays some people still think on it this way).
Here is the [link]
for the first ilustration and in the description you can find more info about the article to understand (maybe) better this draw and the first one.
Thank you for comment and fave!! I
to know you opinion and that you like my work!