Why is rebounding seen so negatively?

Why is rebounding seen so negatively?

I mean, according to one person I spoke with, I shouldn't "show off" going out with other women. I think, who cares? I'm not showing off but I refuse to sneak around either.

This person, who I know used to jump from man to man, has the gall to lecture me because I am organizing a short vacation with a girl I am seeing - according to her its "disrespectful" to my ex. Which is bullcrap because my ex and I already agreed to a "vacation plan" for our separate vacations, shared vacation with our children and work events.

Why is rebounding seen so negatively?
Post Opinion