Brum, the answer is obvious. In these times of global warming, exotic beasties are invading our shores. Tiger Clams are crawling up our sewerage pipes, panthers follow Keef around the streets of Sydenham. Clearly, a poisonous serpent has slipped into the car unseen and had then lurked in the footwell of the drivers seat waiting for a dastardly opportunity. The driver, in his innocence, had leapt into his Motor, started his engine, changed gear, enraged the snake and was then bitten on the todger for his pains. The young lady then had no choice but to suck out the poison. Not wishing to ingest the poison, she would have then, well, erm ... BRUM - DID YOU SEE HER SPIT??