yeah, was going to ask the same thing - I think infertility is a great example of an “unexpected” thing that I wouldn’t think should count as a violation, at least not for hooking up. It’s another matter if a person really wants to reproduce and the partner lies or doesn’t disclose they are infertile and leads them along somehow, but that’s not a hookup situation. A hookup is not a suitable context for reproducing, let’s be honest.