There is a very, very brief scene in The Marine in which John Cena is tickled. It's right after he gets fired as a security guard, and his wife is trying to talk him into a vacation, and she briefly tickles him to get him to say yes. It's cute and looks natural.
This scene is found on You Tube. Search under the words John Cena The Marine. Someone has posted the movie and it's found under Part 3 at around the 6:00mark.
This scene is found on You Tube. Search under the words John Cena The Marine. Someone has posted the movie and it's found under Part 3 at around the 6:00mark.