Related Clues:

• Opening sound?
• "That feels great!"
• Contented sigh
• Sound associated with a 40-Across
• Patient reply?
• Pleased reaction
• Massage sound
• Indication that one is being rubbed the right way
• Sighing sound
• ''That feels g-o-o-o-d!''
• "That's it!"
• Sigh of contentment
• Audible exhalation
• ''How soothing!''
• Massage response