Unlawful longing, concupiscence, lust.—Stephen Jones' Pronouncing and Explanatory Dictionary, 1818
Unlawful or unreasonable longings.—Samuel Johnson's Dictionary of the English Language, 1755
An eager desire to possess something; an ardent wishing or longing; an inordinate or unlawful desire of wealth or power.—Rev. John Boag's Imperial Lexicon, c. 1850
The Lusty Month of May
Although May was once considered a month for courtship and romantic interlude, it was considered bad form and a very unlucky time to marry, which may be why the June wedding became so popular. Sir Thomas Malory wrote of this sexual urge in Le Morte d'Arthur (1485): "The month of May was come, when every lusty heart beginneth to blossom, and to bring forth fruit; for like as herbs and tress bring forth fruit and flourish in May, likewise every lusty heart that is in any manner a lover, springeth and flourish in lusty deeds. For it giveth unto all lovers courage, that lusty month of May." Records suggest that January was once the month when the most babies were born in England, prompting speculation that this was due to the increased springtime libido.
Leading naturally to that awful song in Camelot. I'm intrigued by the concept of "unlawful longing," although I have hard time imagining a law against longings, except possibly under the influence of Oliver Cromwell.