Mneumonics

In school, there are many tricks that you can use to help you remember various medical facts. Some of them are quite perverted yet funny. Here are a few:

The 12 cranial nerves are: Olfactory, Optic, Occulomotor, Trochlear, Trigeminal, Abducens, Facial, Auditory, Glossopharyngeal, Vagus, Spinal Accessory, and Hypoglossal.
What do we future doctors come up with? O O O To Touch And Feel A Girls Vagina and Hymen.

White Blood Cell Differentials:
60, 30, 8, 2, 0
Never Let My Engine Blow
Boy Vern, My Pussy's Tight
explanation:
60% - Neutrophils - Bacteria
30% - Lymphocytes - Virus
8% - Monocytes - Macrophage
2% - Eosinophils - Parasites
0% - Basophils - Toxemia

Erection is controlled by the Parasympathetic nervous system. However, ejaculation is controlled by the Sympathetic nervous system.
How can you remember this: Point and Shoot

Trichomonas Vaginalis is a sexually transmitted disease that produces green colored discharge in women. This is what we use to remember: Girls turn tricks to get the green.

These are just a few off the top of my head. Do any of you have memorable Mneumonics that you've used to remember things?