Here's why:
* Structure: Sonnets are known for their strict structure of 14 lines.
* Lyric Form: Sonnets are primarily lyric poems, meaning they focus on expressing personal emotions and thoughts.
* Common Themes: Sonnets often explore themes of love, beauty, nature, and the passage of time.
However, there are other fourteen-line poems! While the sonnet is the most common, other fourteen-line lyric poems exist, though they may lack the strict structure and rhyme scheme of a sonnet. These could include:
* Free verse poems: With no set rhyme or meter, these poems explore themes through vivid imagery and language.
* Villanelles: A complex structure with repeating lines, creating a musical effect.
* Other forms with variations: Some poetic forms may have variations that allow for fourteen lines.
To determine the specific form of a fourteen-line lyric poem, you'll need to look at its rhyme scheme, meter, and overall structure.