This is why I use the expression "tame your jealousy weapon".
Is it ever appropriate to express your jealousy?
Well, there are so many ways you can positively express your power or jealousy with everyone, especially you and your partner feeling empowered through it.
For instance, if you see your man activley flirting with a girl, you can ignore it or you can playfully go to them, look at your partner and say something like:
"So, darling... Still fantasizing about this birthday threesome? Is she a good candidate?"
If there is good complicity between the two of you, he will get the message that you don't want to get excluded.
The stacked emotional jelousy response is boring!
But jealousy can expand into a whole set of fun responses...
The key is to own these tools! It is to be the master of your jealousy, not its slave ;)