The word "lascivious" traces back to the Latin word lascivia ‘lustfulness’, from lascivus ‘lustful, wanton’, and the Late Latin form, lascīviōsus, was used in a scolding sense by early Church writers, further emphasizing its association with lewdness.  Lascivious has a history rooted in playful, lewd, and lustful connotations. It evolved through Middle English into its current meaning of being lewd or inclined towards lust. 

The earliest known use of the word "lascivious" in the English language is in the 15th century, specifically around 1425, appearing in the writings of John Lydgate.  

Examples of "lascivious" used in a sentence:  
* "This is an allegation of lewd and lascivious conduct, Nancy." 
* "Cool down, Liz; cease that lascivious whistling immediately." 
* "He leered at Elisabeth, arched his eyebrows with a lascivious grin, then stretched with great exaggeration." 
* "But make sure your timing is right - privacy is usually a good idea, keeping the lascivious message between the two of you." 
* "Jennifer "Toastee" Toof, the former VH-1 Flavor of Love 2 contestant who was eliminated because her lascivious background was exposed, is the latest celebreality star whose sex tape has hit the airwaves." 
* "In an effort to shed some of the scandalous and lascivious reputation of the dance, Middle Eastern dancers and enthusiasts began to suggest more spiritual roots to the art of Arabic belly dance."