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1. string of pearls
while titty fucking the guy skeets on the girls neck leaving a "string of pearls".
"He convinced me to let him titty fuck me and I let him only if he would give me a string of pearls..."
2. string of pearls
While fucking a girl the guy pulls out and skeets cum across the girls belly and towards her chin forming a stream of opalescent and translucent droplets of cum that appear to be pearls.
"Darling I love you so much that I'm going to give you a string of pearls."

(Dipping her finger into the cum and tasting it) "I never knew a string of pearls could ever taste so delicious."
3. string of pearls
putting you balls in either a ass hole or pussy and then pulling them out quickly then repeating
string of pearls is great.