Would you be jealous if your boyfriend/girlfriend/spouse had close platonic friends of the opposite ?

I probably wouldn't be jealous. I mean it's like being jealous that he/she has friends. It doesn't really make sense. If they don't like each other like that and are friends then it doesn't matter or it shouldn't at least. If he goes out to hang out with him/her then it would be like you going out with one of your same friends. Purely platonic. So I think if there is jealously then it's just insecurity.