My friend Jaques likes white russians, very milky, with lots of half and half. My friend Jane never drinks. One night, Jane had a sip of Jaques' white russian, and went into a momentary reverie. She reported having thought hard, and realized that she recognized the taste from her childhood.... when she was unable to sleep, her mother would bring her a little glass of "vanilla milk" which had reliable soporific properties.

Her mother denies this.

Upon hearing this, my friend Lisa reported that her mother used to give her "medicine" before embarking on long plane trips. When she grew up and saw her mother giving it to her younger siblings, she recognized it as diphenhydramine.