Board Thread:Questions and Answers/@comment-27741771-20160311165848/@comment-86484-20161001133405

Mettaton has never exhibited attraction towards anyone (other than himself?). So there's no way to tell. He likes pink, which for some reason people say straight guys are not supposed to like, but that's ridiculous; color preference is unrelated to sexual preference. The way he speaks (constantly using words like "darling", "beauty" and "fabulous") may be enough to list him as metrosexual (or maybe he just caught those mannerisms from his human idols, we've seen how he tries to imitate everything he thinks humans do), but again that says nothing about which gender he may be attracted to.