Related Clues:

• Sound despairing when spectacle fails to end
• [That's so ... sad]
• "Feels wonderful"
• Music to a masseuse's ears
• Lugubrious sound
• Audible breath expressing weariness
• 'I like this back rub!'
• [It's hopeless]
• Dentist-induced sound
• 'OK, whatever' noise
• ''So relaxing!''
• A joyful noise
• Response to a masseur
• Contented exclamation
• "That feels good"