Start stroking the closest cock

You slowly approach the cock closest to you, examining it for any sign it might be Tyler's. It is already hard, standing firm at about 5 inches long, and very thick. The man is uncircumcised and a little pre-cum has already started to form on the tip. You reach out hesitantly and finally grasp the cock in your hand.

As you start to stroke you hear a sharp intake of breath from behind the wall. You can tell from the sound that this isn't Tyler's cock. Do you move on or finish the man off?