Yea ima knock twice when I get there
Playing on the custom of knocking on the door of the person you’re visiting. If he knocks twice, she’ll surely know he’s there, and let him in.
He’s going to have sex with her twice, just after he gets there. ‘Knocking the Boots’ is a term made popular in the 90’s by the H-Town song by the same name. The term plays on the idea that during missionary sex, the feet of the male and female are close, and, if they kept their ‘boots’ on, they would ‘knock’ up against each other.
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