I really feel that as long as a parent doesn't go OVERBOARD and make sweets more important because they're forbidden, like my neices and nephews who would eat any and ALL sugar they could cram in away from home, because the Mom wouldn't let a drop past the door...

When the younger niece was about 3 years old, they went out to Grandma's house to visit. "Do you have any cookies, Gramma?" she asked...."How about Lucky Charms?".... as Grandma laid out the treats for her to choose ONE of (a Grandma who knew to respect the Mom enough to have worked a compromise out ahead of time with the Mom...a rare find!) She gathered the box of cereal, and BOTH kinds of cookies into her arms and announced "I'm ready to go HOME now Mommy!"