The actor, who plays Ken Barlow in the soap, is currently in New Zealand after the controversy surrounding his suggestion that abuse victims were being punished for past actions.
He made his latest comments on the cookery section of the Good Morning show, after he went to chop a tomato for a quiche but realised cookery host Jeanette Thomas had already done it.
He said: "You naughty girl! I would say I am going to smack your bottom but, I would love to do that, but we are not allowed to on TV."
As Thomas tried to laugh off his comments, Roache added: "There's life in the old dog yet."
Speaking on the show, Roache later discussed his beliefs as a member of spiritual group the Pure Love movement.
He said: "However horrible somebody is, if you love them, pour love back at them. That will help them to recognise who they are."