I get it in every day like white socks
He’s alluding to a habit that some males have of masturbating into white socks, which don’t stain due to the color. Most teenagers masturbate daily, so the socks get semen in daily just like Kassa gets his dick into attractive women daily.
For a less, and yet more, salacious allusion, white socks are the most basic of all socks, thus, it’s pretty common for a male with a basic wardrobe to wear white socks every day. Kassa suggests that he “gets it in” (has sex) every day, just as someone would put on a pair of basic white socks every day.
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