Brought up as a player under the authoritarian rule of Sir Alex Ferguson, Wayne Rooney has still had to catch himself sometimes in the most recent years of his career when he sees players sitting in the dressing room, chatting to friends or family on FaceTime.
Rooney's smart enough to know that football culture changes but he laughs when he remembers trying to offer Memphis Depay some advice during the Holland international's stay at the club under Louis van Gaal.
'He came on at Stoke away,' Rooney recalls, 'and he messed up for their goal and he only played 15 minutes, so Van Gaal told him he was playing for the reserves the next day.
'So after the game I just said: "Look, it's going to be a bit difficult for you. Just don't come in with all your fancy stuff."
'The reserve game was at Altrincham's ground and he turned up for it in his Rolls Royce, wearing a red leather jacket and a cowboy hat. And I just thought: "What's the point."'