Peridot squinted a little at Jenkins at that, trying to puzzle out the question. She understood 'sexual,' if only because of the books that Lucille had recommended to her, most of which just left her further confused on the practical applications of human anatomy through liberal usage of purple prose. And of course she understood 'dimorphism.' That was actually the easy part of that sentence. But the two together?

"... What's that?"

Yes, she was going to ask.