Most Helpful Guy
Maybe they both just have a lot of free time atm?
Unless what they say is intense, I think they are just having a decent crack
Most Helpful Girl
It's the norm if they're dating you or especially if they're trying to date you.
Some friends even talk that regularly. Mine and I do.
It's mostly about what is comfortable to you though. If you feel like you don't have anything to say or are busy, then tell them you'd like to talk less often.