My theory -- and I'm going to need a grant to really explore this -- is that Boudica was a cross-dresser. The King put his picture on the coins, but liked to dress like a girl when he went into battle.
In today's academic climate I think I will have no trouble scoring $50K for do some research. I'm hopping on the Trans-gender bandwagon, baby!.
Some of the Barbarian tribes that attacked Rome went into battle naked.
The Celts that fought the Romans were fierce fighters but not as disciplined or organized. Boudica's forces outnumbered the Romans 8-1 but were wiped out with minimal losses to the Romans.