Board Thread:Questions and Answers/@comment-28067574-20160905085918/@comment-28067574-20160906055725

MABIAN:

"Way back when, all actors in a troupe were male. Which meant that men played all female roles as well as male roles. There are probably even instances today where men play female roles".

That's true, but imagine a school play is being held, and there's a boy and there's a girl. Unless both of the kids REALLY want to, the organisers are not going to independently cast them both as opposite roles.

WILDKITTEN1234:

"I don't see what this has to do with it? Alphys thinks it's strange because she has to act as someone else rather than herself. Frisk would play a girl either way."

Sorry that I didn't make it more clear. That's what I meant. It's just an example of unnecessity. If it doesn't make sense that Frisk roleplays Alphys since she's right there, it wouldn't make sense for Mettaton to roleplay as a girl if Frisk is already a girl.