What is Investigating His Crime Scene?
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A slang term for masturbation.
Self-gratification. The act of "playing" with your genitals, for sexual excitement/pleasure; usually to orgasm.
I walked into the room and there he/she was, naked and sprawled across the bed investigating his/her crime scene.
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When a girl is giving you head upside down, making her face turn bright red, and you finish into your hands and proceed to slap her with..
