Then there are the ones which signify an actual significant relationship - first meeting of the family, for instance (although I don't make it such a big deal with my own father). But the first meal cooked for the panther's mother seemed like a pretty significant milestone (it went well - lovely afternoon and evening). Living together. (This has always seemed like a massive step with much deliberation required - strangely this time we just did it because we really seemed to not want to sleep apart from the other - to which there was a simple solution - don't). I used to feel possessive of my space but find I'm not with the panther.
Last week we passed the one that is about nursing one another through illness - I was struck down by food poisoning (vomiting, diahrea, and sometimes, sadly, both at the same time), once I felt just about back in the land of the living he came down with it. So we now have experience and knowledge of how to care for the other (neither of us is a hibernator who takes themselves off until they are well again).