My husband is one of my favorite people on the planet, and literally one of the kindest and most caring people I know. But I learned the hard way that even the most awesome partners might not be immune to cultural stereotypes about "hormonal" postpartum women. Now, I am not saying that post-baby hormones aren't a thing (because they are), or that I didn't experience my fair share of them (because I did), but there are postpartum feels you shouldn't let your partner blame on hormones, no matter what.
This dismissive approach to all the feelings most postpartum women are bombarded by is, in my opinion, just another way our culture (and our partners) ignore women's real emotions and invalidate their experiences. Recovering from childbirth is a huge ordeal — physically, psychologically, and emotionally, Between sleep deprivation, postpartum depression, and healing physically from literally growing a human inside your body, the last thing you need (or probably appreciate) is your partner telling you that whatever it is you're feeling is "just hormones." In fact, if you ask me, the word "just" shouldn't be in your vocabulary when you're describing your partner's postpartum experience, because you probably have no idea what they are going through.
When your partner is recovering from childbirth I highly recommend not telling them how they feel, how to feel, or why they are feeling the way they feel. Instead, try asking them how they feel and what you can do to help. I can guarantee blaming their mood on hormones won't make that list. In the end and always, the little things often make the biggest difference, so make sure you pay attention to your postpartum partner and stay away from invalidating their experiences in the following circumstances (or, you know, ever):