"Not so loud!" Fern said. And Fern was sure Penny was going to crawl right out of their hiding place and slide like a seal down the dune until she landed at the boy's feet.

At that moment, however, the boy's cock flexed. He began to wag his cock like a dog wagging its tail.

"Wow!" Penny whispered. "Never saw a guy do that before."

"Just keep quiet and watch, and you'll see him do a lot more," Fern said.

"How do you know?"

"Because I've had experience," Fern said. "Because I know how to keep quiet and watch. I've seen guys do things you wouldn't believe."

"Like what?"

"Just watch. You might learn something." Penny stared at Fern for a moment, then went back to watching the boy. Fern felt more at ease. Penny had a wide-eyed childish look; she was curious now. Maybe she'd behave herself. Fern smiled, feeling motherly.

The teen wrapped his right hand around his cock and began to beat it. His cockhead swelled and glowed purple. Down below, the boy's fat nuts flopped up and down. The teen had turned toward them now, and Fern could see his tongue between his lips, could see his half closed eyes.

"Shoot it, honey," Penny whispered.

"He just started," Fern said. "Give him time."

The naked teen worked his fist up and down the length of his cock, stretching and tugging at the cockskin, caressing it. The muscles of his brown arm bulged. The muscles of his abdomen danced. He wiggled his toes and nodded his head.

"He's feeling good," Penny said. "I can always tell when a guy's feeling good. Look at the way he's licking his lips." She licked her own lips. "Oh, honey, let me suck it!"

"Calm down," Fern said. She was feeling hot herself, especially when she heard Penny say she'd like to suck the boy's cock. Fern herself had always had the crazy desire to suck on a boy's cock, but she'd never known that anybody else shared such a desire. Often, Fern sucked on her thumb while she rubbed herself off, pretending that her thumb was a boy's cock. She couldn't believe that girls actually did such a thing.