Things You Should Be Comfortable Discussing With Your Partner
(Some of) your past
You don’t need to (and probably shouldn’t) tell your current partner details about your sex life with a past partner. However, you should be able to discuss the existence of exes, and your dating life before this partner, without it triggering a fight. Simply stating that you’d been to a certain destination with an ex should not ruin the afternoon. Unfortunately, for some couples it does, because jealousy and possessiveness run so high that even the reminder that a partner had a life before this relationship causes issues. That is very unhealthy though, and it’s just not sustainable. How are you going to spend a lifetime with someone if you can never talk about the years before you met him?