With his arm curled around Ianto's shoulders, Jack stared at the pebble in his hand for a long moment. "May be pretty to look at but until it's thrown, you never know how far it will go." Yes, Jack was attempting to talk about this without talking about it. He did, however, know the similarities could only go so far.
Reaching for the pebble, Jack tossed it in the air and caught it one handed, nodding his approval. "The perfect weight for throwing, even if it's a bit windy." Jack looked down at Ianto, resting his cheek against the top of Ianto's head. "What do you say about giving it a go?"