Sure, why not?

Grinning to himself, Dave agreed. Unzipping his fly, he dropped his pants to the floor, followed by his boxers. His cock, however, barely stirred.

"I need someone to help me with this, and since you asked, Sarah, I think you should be the one to help me out. I can't very well masturbate with a soft dick, now can I?"

The other two girls nodded that this was true, and Sarah sighed. "I suppose I can help you out a little bit."

Smiling, Sarah moved forward on her knees until she was eye level with his soft cock. "Tell me if this tickles," She said, and took the head of his dick into her mouth, sucking it gently.