Change from conventional, clichedtacky Valentine's gifts to a more honestappraisal of the truenature of love/the more responsibility that comes after certain lengths of time a relationship lasts/the changingnature of romance after marriage.
'Igiveyouanonion.'
Speaker is addressing a romanticpartner but gives something unexpected. A change from the conventionalValentinegifts.
Simile, accepts the truth about love - it isn't all perfect and happy. An onion'sscent compared to being hurt by the one you love. Love has it's up and downs.Partners can leave us in tears, suggesting the emotionalpower they can hold as a lover. Heartbreak can result from love. The onion can sting your eyes the way we can be stung by anothersheartlessness.
The speaker is unwilling to be defined by society'sconventionalview of romantic love which prompts her attempt to breakfree of romanticstereotypes and be more truthful, more authentic.
'Notaredroseorasatinheart.'
Speaker dismissesstereotypicalValentinegifts , as they do not think they hold much worth.
Contrast between the sentimentalisedview of love expressed through cliches and the truer view of love shown through the speakersgift. Encourages an honest, uncompromisingview of humanrelationships.
'Itpromiseslight.'
Suggesting assurance, guarantee, optimism, and hope at the beginning of relationships, which contrasts with heartbreak, and negativity at the end of relationships.
Unconventionalview of love/rejection of stereotypicalview of love/bitterness associated with rejection/violentrelationships/idea that love does notalwayslast.
'Lethal.'
Love can destroy a person as easy as a knife can destroy an onion.