when 5 males jizz all over their woman while on the beach. after thejizzing fest, she rolls around in the sand like a churro. they then loogie on her tits and lick her ass clean.
To pass out naked, most likely when drunk and male, on one's back, arms and legs spread out. Hence, starfish.
That one guy at the party that always has to get naked after getting completely smashed, and just so happens to pass out, still butt-naked, spread eagle on his back. Rockin' the starfish. Not a care in the world.