Eddie Jones has warned Kyle Sinckler not to make any repeat of the off-field mistakes that saw him arrested at the end of the British and Irish Lions tour.
The England head coach vowed Sinckler will find himself in "strife" if he does not learn from the chastening experience that followed the Lions' 15-15 draw in the third Test in New Zealand last month.
Harlequins prop Sinckler was arrested but released without charge just hours after the Lions series ended in a draw, with Auckland police escorting him back to the tourists' team hotel.
Sinckler was arrested for "minor disorder" during a night out in central Auckland, and Jones has warned England's players to be more careful about where they let off steam.
"It is not a black mark against him but it will be if he does it again," Jones said of Sinckler's arrest.
"Everyone can tell you what you shouldn't do but you have got to experience it yourself.
"It's a good lesson to have and I think everyone will see that and learn from it. If they don't learn from it they are in strife.
"After the tour he's got to pick his foot up a little bit better. During the tour he was asked to play a role for them and I think he did pretty well.
"He's got to understand that the team comes before the individual. If he wants to develop his rugby career, that'll be the big thing for him.
"You need to pick the right place to have a drink. After the third Test for the Lions you don't go to a crowded club in Auckland. You're going to have every idiot in Auckland wanting to take him on because they know he's a hot head.
"There'll be some bloke saying to his mate, 'hey, go and talk to that idiot over there'. Experience teaches you that.
"The experienced players don't go to those clubs. They find a quiet place to have a drink because they know that night's going to be volatile and some Kiwi will want to make a name for himself.
"It's not a black mark against him but it will be if he does it again. It's a part of the learning experience.
"We like to leave the off-field stuff to the senior players. At the end of the day you have got two periods with the team: you have the nine to five where the coaches are heavily involved and you have got the five to nine where the coaches are not heavily involved.
"In that period is where the senior players are instrumental."