This is just me, I think the two things are different, some people like to connect and just use general pleasantries instead of names to make it more familiar and less formal especially when being long time friends.
Would "hey fella, hey lovely, hey sweetie" also give you the ick or just the "handsome", "gorgeous", "sexy" etc as they are more about his appearance?
I am the nickname giver in my friendship group. My best mate who is also a guy is "hey dude" and he calls me exactly the same!
I think that in isolation is harmless and I'd say, try and ignore, it's a habbit imo.
But the greeting is super cringe.
I'd have said "oh we mount each others partners now. Cool." With a fake vom in the moment.
But if you don't want to talk to her about it, you could just say next time you make plans just gently put in a boundary. "I'm not sure you realised at the time, but the way you greeted hubs last time by mounting him, made us both super uncomfortable, so if you can avoid that this time we'd really appreciate it!"
I mean, if generally it's all really upsetting you, I'm sure a good friend would feel awful if she knew, so if you do decide to talk about it, be brave and address it. You've been friends a long time I'm sure she isn't even aware.
I'm sure whatever you decide it'll be ok.