Poor, poor Grievous. Perhaps he was traumatized by this topic at an early age.....or he was traumatized by Voldemort....[link]
. Either way, any mention of this topic sends Grievous reeling backwards in sheer horror. It may just be the one thing he's truly afraid of besides judgement day.
One the subject of that time of month, tampons really. really. really. really. REALLY.