In John Masefield's "Sea Fever," why does the speaker want to go to the sea again?

The speaker in "Sea Fever" longs to go to the sea again because it is the place that speaks to his soul. He longs to connect with the powers of the sea and doesn't need sophisticated boats to satisfy this calling: "all I ask is a tall ship and a star to steer her by."
The speaker reproduces the sound of the wind in the alliteration of the third line: "the wheel’s kick and the wind’s song and the white sail’s shaking." He needs to get back to the tide of the sea because it is wild and free. He loves the sounds of the sea: the cry of the gulls and the sound of the wind. He loves the sights of the sea, from the grey mists to the white clouds.
In short, the speaker has a sense of wanderlust that is fulfilled through a connection to the sea, a call to explore and to live adventurously. The nature that surrounds him at the sea is addictive, always calling him back for more.