Luke 8:43-46 (also Matt. 9:18-26; Mk. 5:21-24)

43 And a woman who had a hemorrhage for twelve years, and could not be healed by anyone, 44 came up behind Him and touched the fringe of His cloak, and immediately her hemorrhage stopped. 45 And Jesus said, “Who is the one who touched Me?” And while they were all denying it, Peter said, “Master, the people are crowding and pressing in on You.” 46 But Jesus said, “Someone did touch Me, for I was aware that power had gone out of Me.” 

This story is recorded in both Matthew’s gospel (Matt. 9:20-22) and Mark’s gospel (Mk. 5:25-34), but only here in Luke’s gospel was it indicated that Peter was the central person who said to Jesus, “Master, the people are crowding and pressing in on You.”

So, it seems that Peter was speaking for all the disciples. He was the spokesman. And also, when Jesus said, “Someone did touch Me, for I was aware that power had gone out of Me,” He was speaking mainly, or more directly to Peter. Hence, I think Peter was getting Jesus’ response more than the others.