Possible Clues:

• Nervous laughs
• Silly laughs
• Slumber party sounds
• Typical farmer astride gee-gee is a funny fit!
• Pop singer, mostly with guitarist Paul after good laughs
• Uncontrollable laughter
• Titters, as legs buckling after performance
• Schoolgirl sounds
• One-night stand with heartless girl points to something that may be catching
• Laughs