Sounds fishy but it's from a newspaper so it must be true. From The Mirror.
Oral sex assassination plot: Woman accused of putting poison in genitals to kill husband
Jan. 28, 2013
A woman is being sued by her husband for allegedly trying to kill him by putting poison in her genitals.
The Brazilian wife is accused of planting a toxic substance on her vagina before luring her husband to bed and demanding oral sex.
Reports in the South American country suggest he was ready and willing, and only escaped death because he noticed a strange smell.
The curious husband then took his wife to hospital in Sao Jose do Rito Preto to find out the cause of the unusual odor.
The alleged attempt on his life was exposed when tests on his wife discovered traces of a poisonous substance down below.