A relationship rests on how much you talk, how well you talk and what you talk about. It would be difficult to define the just right and simply wrong when it comes to the first two, but of course, there has to be a deliberate effort for the third! If you want to evade the sher-ke-mooh-mein-haath-daalna situation, don't talk about these things to your girlfriend!

Past sexual experiences

She might not have a problem with your sexual history, but you don't need to fill her in with it.

Her girlfriends

If you appreciate them, you're hitting on them and if you bitch about them, you're bad person.