The thing is that Eridians canonically breed externally, by just laying eggs next to each other. Since it happens outside the body, and exclusively for procreation, it seems unlikely that this process would have the same kind of taboos attached to it that human sex does?
By comparison, book Eridians have huge taboos around eating. Possibly in part because they shit at the same time as they eat. Grace manages to talk Rocky into letting him watch him eat 'for science', but it's a hugely awkward experience. At the end of the book, it's mentioned that Rocky had to tell Grace to stop talking about food in 'polite company' when they got to Erid.
So what I'm saying is: Eridian middle school teacher Ryland Grace is probably gonna have to train himself back into saying “fuck”, because “fudge” is likely way more profane from an Eridian perspective.
