I just don't get it!

It's not incredibly unusual to walk into the bathroom at work to the sound of someone talking on the phone from inside a stall.  It may be a reflection of where I work or a cultural divide, but I rarely hear English from the stalls. But honest to God I don't get it!  Doesn't matter who is doing it.  ICK!!  


Bring your phone into the bathroom to play a game or read your email if you think it might be an extended stay.  But whole phone conversations in a public washroom stall while people in other stalls flush?  


I don't get it!