Related Clues:

• Sounds from a hot tub
• ''That's it!''
• Satisfied sounds
• Sound of relief
• Sound of contentment
• ''That's the spot!''
• Signs of comprehension
• 'That's nice!'
• Expressions of pain relief
• Rubdown sounds, perhaps
• Cries at fireworks
• Sighs of pleasure
• Sounds at a masseur's
• Starts of sneezes
• Reaction to a back rub, maybe