Shelley's Marriage ...

Percy Bysshe Shelley, famously called Shelley is one the very popular poets of English literature. And like very creative people of other fields, he too had enigmatic elements in his life.

...Four months after being expelled, the 19-year-old Shelley travelled to Scotland with the 16-year-old schoolgirl Harriet Westbrook to get married. After their marriage on 28 August 1811, Shelley invited his college friend Hogg to share their household. When Harriet objected, however, Shelley brought her to Keswick in England's Lake District, intending to write. Distracted by political events, he visited Ireland shortly afterward in order to engage in radical pamphleteering. Here he wrote his Address to the Irish People and was seen at several nationalist rallies. His activities earned him the unfavourable attention of the British government.

Unhappy in his nearly three-year-old marriage, Shelley often left his wife and child (Ianthe Shelley, 1813-76) alone, first to study Italian with a certain Cornelia Turner, and eventually to visit William Godwin's home and bookshop in London, where he met Godwin's daughter, Mary Wollstonecraft Godwin, later known as Mary Shelley. Mary was the daughter of Mary Wollstonecraft, the author of A Vindication of the Rights of Women.

On 28 July 1814, Shelley abandoned his pregnant wife and child when he ran away with Mary, also inviting her stepsister Jane (later Claire) Clairmont along for company. The three sailed to Europe, crossed France, and settled in Switzerland, an account of which was subsequently published by the Shelleys. After six weeks, homesick and destitute, the three young people returned to England. In the autumn of 1815, while living close to London with Mary and avoiding creditors, he wrote Alastor, or The Spirit of Solitude. ...

(source - Wikipedia)

Wish I could do it ... oh yes 'm not 19yrs old ... ecchhh . And Galois the great Mathematician who died at age of 20 ( he booted Group Theory and, Galois Field - a finite field, is named after him) was similarly a big revolutionary in 19-20 ... Galois died, some say its because of a love affair-

...Some archival investigation on the original letters reveals that the woman he was in love with was apparently a certain Mademoiselle Stéphanie-Felicie Poterin du Motel, the daughter of the physician at the hostel where Galois remained during the final months of his life. Fragments of letters from her copied by Galois himself (with many portions either obliterated, such as her name, or deliberately omitted) are available.The letters give some intimation that Mlle. du Motel had confided some of her troubles with Galois, and this might have prompted him to provoke the duel himself on her behalf. This conjecture is also supported by some of the other letters Galois later wrote to his friends the night before he died. Much more detailed speculation based on these scant historical details has been interpolated by many of Galois' biographers (most notably by Eric Temple Bell in Men of Mathematics), such as the oft-repeated conjecture that the entire incident was stage-managed by the police and royalist factions to eliminate a political enemy. ...

(source - Wikipedia)

When you are in age of 18-20, you are altogether different person ... the music is always unscripted.