Related Clues:

• Not for prudes
• On Santa's bad list
• ___ by Nature
• Disobedient, child perhaps
• Deserving an R rating, perhaps
• Like 'Fifty Shades of Grey'
• Like "Fifty Shades of Grey"
• Not suitable for children
• A little naughty
• Risque or titillating
• Like some R-rated films
• A bit risque
• Not pleasing to Santa
• For the mature only
• Containing double entendres, say