Can you train a hamster to sleep on you?

[MikeTherk]

Is it possible to train a hamster to sleep on you?

I always see videos on Instagram of hamsters sleeping on their owners, whether it just be on their lap or in some sort of sleeping bag.

I know every hamster is different and neither of the two that I've had have relaxed enough to sleep on me, but I'm wondering if there's anything I can specifically do to help lull them to sleep when not in their cage.