Thank you for your answer. I already turned off Push Alerts on one of the watches. But that's not the solution I'm looking for. I'll use it like this, but I indeed switch watches frequently.
I sent a suggestion, but I don't think they care that much about our suggestions, except if there are too many to count.
I also sent another suggestion (which might not interest you for obvious reasons, but I just want to share), asking for Portuguese language in Native Portuguese, since they only have Siri in Brazilian Portuguese.
Once again: thank you for your kind reply.