Doctor Martin's dull life is changed suddenly when he is seduced by the school principal’s daughter and then given lessons in love-making by her gorgeous young step-mother. Her advice to the young doctor, imparted after a steamy afternoon between the sheets, sees him taking a job on a luxury cruise ship, where his sex education is increased by the attention of a trio of sexually voracious nurses. The heat of the Caribbean voyage goes up by several degrees as he gives his attention to the smooth dark skin and shaven pussy of Jamaican nurse Suzanne, finds himself succumbing to the soft hands and hot mouth of Anna, the Swedish sex-pot and finally lands between the wide-spread, willing thighs of Scottish Mary, who likes whisky with her sex. Suzanne and Anna take bets on the good doctor’s physique and his sexual performance during the voyage, and the two girls finally gang up on him to give him the greatest sex lesson of his life. The biggest bet is whether or not he has the stamina to survive long enough to enjoy it!