Related Clues:

• 'Feels so good!'
• Manx murmur
• Catnap noise
• ''Ni-i-ice!''
• Cry of 58 Across
• Hot tub sound
• Jacuzzi sitter's sigh
• Shiatsu response
• Delighted expression
• ''That hits the spot!''
• Something often said to dentists
• Note of satisfaction
• "Say ___" (dentist's request)
• Sound from Catwoman
• Relaxed reaction