Kissing his wife
Cameron and his wife Chelsea Noble met on the Growing Pains set. Due to his strong religious beliefs, he declined to do kissing scenes with someone other than his wife until Cameron and Noble became an item.
The star would make sure the kissing scene would be replaced by Chelsea, even though Cameron wasn’t kissing her character. During his time on Growing Pains, he avoided physical contact with someone other than Chelsea, which may be a major limitation for an actor on another set, but he stood by his principles.