You might as well just leave the other towel in the sand.
You saw the barely hidden looks of disgust your friends gave each other when you pulled out that old, frayed, bleach-stained towel out of your beach bag. 'Um ... my good beach towel was in the washer,' you stammer lamely. But, it's too late. You're basically the hobo of the beach. The persona non-grata of your laying-out mates. Next time (for your the sake of your dignity), bring the Billabong Catnap Towel to lay on so you won't embarrass yourself or your friends.