Lethal. It's scent will cling to your fingers,
-Use of minor sentence "lethal" reflects how abrupt and painful love can be.
-repetition of verb "cling" is negative and suggests annoyance and frustration. Suggests that love is ongoing and lasts forever.
-the adj "lethal" has connotations of death and pain - perhaps love can be harmful and damaging. The past experiences will not disappear, it will exist to try and remain, poisonous