Related Clues:

• Sound of satisfaction?
• Apt rhyme for "spa"
• Expression of insight
• “Feels good!”
• “What a relief!”
• Bubble bath sigh
• Neck rub response
• 'This is so exciting!'
• 'Yes, that spot right there ...'
• "What a great back rub!"
• "Oh yeah, that's the spot"
• "I needed that!"
• Sound that a dentist loves to hear
• Response to a dentist, maybe
• Sighed sound