1) started singing along with my late Dad, an ex navy man who taught me Rio Grande and Bowline Haul
2) Years of collecting from other singers and in later years from Stan Hugills Book Shanties from the Seven Seas
3) I sing 'em and others join in. Sometimes I'll post them here if people want the lyrics
4) Dad, Johnny Collins and Jim McGeean, Stan Hugill, Harry Prigg, and a dozen folk clubs down the years, Also Aboard the Winston Churchill and the Barque Endeavour
5) I think it helps to spread lyrics and keep the interest alive, but you can't beat just singing them.