Sonnet
It was, however, Sir Philip Sidney's sequence "Astrophel and Stella" (1591) that started the English vogue for sonnet sequences. The next two decades saw sonnet sequences by William Shakespeare, Edmund Spenser, Michael Drayton, Samuel Daniel, Fulke Greville, William Drummond of Hawthornden, and many others. These sonnets were all essentially inspired by the Petrarchan tradition, and generally treat of the poet's love for some woman, with the exception of Shakespeare's sequence of 154 sonnets. The form is often named after Shakespeare, not because he was the first to write in this form but because he became its most famous practitioner. The form consists of fourteen lines structured as three quatrains and a couplet. The third quatrain generally introduces an unexpected sharp thematic or imagistic "turn", the volta. In Shakespeare's sonnets, however, the volta usually comes in the couplet, and usually summarizes the theme of the poem or introduces a fresh new look at the theme. With only a rare exception (for example, Shakespeare's Sonnet 145 in iambic tetrameter), the meter is iambic pentameter.
Sexuality of William Shakespeare
Shakespeare's sonnets are cited as evidence of his bisexuality. The poems were initially published, perhaps without his approval, in 1609. One hundred twenty-six of them appear to be love poems addressed to a young man known as the 'Fair Lord' or 'Fair Youth'; this is often assumed to be the same person as the 'Mr W.H.' to whom the sonnets are dedicated. The identity of this figure (if he is indeed based on a real person) is unclear; the most popular candidates are Shakespeare's patrons, Henry Wriothesley, 3rd Earl of Southampton and William Herbert, 3rd Earl of Pembroke, both of whom were considered handsome in their youth.