From my experience – indeed they may! One time, I was sleeping beside my hot gf. Wake up in the middle of the night probably 1 or 2 A.M. already and guess what my gf is under the covers licking my penis and balls! I’m like hey babe what are you doing and no reply so it turns out she was sleepwalking!!!! I wake her up and let her know what was happening and she said oh sorry daddy I was just dreaming about having sex so me being the nice I am told her okay let’s fuck and so we ended up banging all night lmaoooo. I guess the 2L-DR would be yes, people CAN and WILL lick things while sleepwalking if they have the desire!!!!!!!!