While I was sleeping

Last night I decided to go to sleep with both cage doors open. I shut off the lights and figured both birds would stay where they were and head to sleep. My room was pitch black - and after a few minutes I hear little footsteps from Allegra's cage. I wait a few more minutes before turning my lamp on... To my surprise, she went right into Charlie's cage and was laying right up against him! He didn't seem to mind at all - in fact.. I let them be and when I woke up at 6:30am they were still next to each other!! It was adorable :)
I do not really want them getting into the habit of sleeping together but I figure on weekends while I'm home it'll be a nice treat for them!