Doc Martin, Series 3

(After the concert, Louisa leads Martin into the woods. They kiss passionately)

Dr. Martin Ellingham:
-You're very emotional, Louisa. Are you wearing perfume? Is it sandalwood?

Louisa Glasson:
-No, it's kenzo flower.

Dr. Martin Ellingham:
-I wondered whether it was pheromones. Androstenone 5 has a sort of sandalwood odour - faintly urine-like, if you prefer. It's the pheromone associated with the onset of the menstrual cycle. And it's often accompanied by mood swings.

Louisa Glasson:
-Urine-like?

Dr. Martin Ellingham:
-It's only faint. Am I right?

Louisa Glasson:
-A woman doesn't have to be getting her period to be a bit emotional.

(Louisa walks off in a huff)