Definitely can relate to this situation (of your ex). It definitely can be a case of difficulty "judg[ing] how/when to jump in", I certainly am below-average on

Definitely can relate to this situation (of your ex). It definitely can be a case of difficulty "judg[ing] how/when to jump in", I certainly am below-average on that measure. However, a separate but related trait is that I often find myself internally running through several iterations of what I want to say, only to realize that by the time I've winnowed it down to the relevant info and am ready to speak, the conversation has moved on.