I don't think it matters. The only thing I think is relevant to sleeping on your left side is it lowers your blood pressure. Maybe good blood pressure means pleasant dreams?
Is it true that if you dream while on your left side you'll have pleasant dreams but if on your right side you'll have less pleasant dreams?
I'm not sure, but I do know if I sleep in moonlight it gives me horrible nightmares.
I sleep on both sides (also back & tummy), but have oddball dreams no matter what! :)
I don't know.
Sleeping laterally is the most common sleep position. Studies have found that right-side sleepers experienced more positive dreams and fewer nightmares than left-side sleepers. ... Sleeping on your right side may cause you to dream of swallowing or burning.”
www.everydayhealth.com/sleep/can-changing-your-sleep-positio
