This is what the Sleep Assessment and Advisory Service said:

"Starfish position - Sleepers who lie on their backs with arms up near their head or the pillow account for 5% of participants. These people are good listeners, helpful, and are uncomfortable being the center of attention. People who sleep in starfish position are more likely to snore and to suffer from a poor night's sleep more often."

Some similarity I guess, or am I just being charitable?