I don't need emotions to open your deep sea
“Emotion” is said almost as ‘the motion’ — referring to “the motion in the ocean” (play on sea/ocean/motion) which is sexual innuendo for the motion of people humping each other. A rhythm similar to the motion of the waves and swells in the sea.
In order to open her sea (i.e. get her wet) Wale doesn’t need to tap into any emotions, it’s all physical.
To help improve the meaning of these lyrics, visit “Bad” by Wale (Ft. Tiara Thomas) Lyrics and leave a comment on the lyrics box