Who's in which bed?!

It is pretty common to go into the boys' room after we've put them to bed and find them in different beds than where they started. Tonight was a first...
Logan and Alex sharing Logan's bed:

And because it's so cute the way kids sleep (and find comfortable) - Nick in Alex's bed:

Notice that even though Alex and Logan are in the same bed, they both have their own pillows. The question is... do I go and separate the two of them?