Why does my hamsters lick my hand?

[Shina]

As you may know, my Russian dwarf hybrid gave birth to an accidental litter of 7 while 6 survived the raid of ants, they have now begun to lick my hand when I'm trying to introduce them to human hands, 1 still bites till it draws blood and another swats my hand away while the rest are just licking very gently, including momma. They live in a storage bin now, since they've grown up, was wondering if they are signaling they want or need something.