It depends on your partner and the kind of person s/he is. Sometimes people look up their ex's just to see if the ex is miserable and to rub it in the ex's face. Sometimes something reminds someone of their ex, like a place or a song on the radio, so they look their ex up.<br />
But sometimes it isn't so kosher. If you suspect that maybe your partner is cheating on you with his/her ex, you should talk to him/her about it.
Anything behind your back is bad. (But, unfortunately, rather common.)
I just tried privately messaging you about this, but I couldn't -- I think you have to add me first.
its really bad when this kind of things happens in a live relationship, he/she must have some feelings left for his/her ex and its like a spark in dry leaves.
they are no over them yet!
Bad news...and a big red flag
the bad part is him doing it behind your back....why does he feel the need to hide it from you?
And you do have a reason..he knows what he did was wrong and if he didn't get caught he may have cheated on you.. that is disrespectful to you and your relationship with him