Like to sleep on your side? I mean, who doesn't?

May not be so good for your skin though. Sleeping on the side can lead to creases forming on the cleavage from physical force of skin on skin. That’s why it’s better to sleep on your back. Sleeping on your back will not only give you a crease free cleavage, but also will help to avoid some facial wrinkles. For instance, did you know that nasolabial folds form deeper on the favourite sleeping side? In fact, sleeping on your side can eventually interfere with the whole symmetry of your facial features.

So as of now, sleep on your back ! :-)