And rock right up to, the side of my mountain
This is the beginning of an array of nature metaphors to convey this sexual experience.
They mountain is associated with the noun, rock, as well as the journey to climax. As he “rocks” she gets closer to her climax which is the “peak” she refers to in the next line.
These natural metaphors imply that Beyoncé finds everything not only exciting, but beautiful in the same way that mountains or waterfalls are.
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