First read about this notion from a short story called THE MOON IN IT'S FLIGHT by Erica Jong.
How many times have you been influenced to do something energized by getting to know someone, or having a "thing" for someone (you don't really know them at all)?
Spurned by fantasy, I have:
Done a painting. (which has been lost, I don't know where. I thought I had it as a rolled up canvas but have not seen it in years.)
Moved to a bigger apartment. (Where I had a party and he flirted with another woman in my kitchen!)
Avoided my favorite TA at UCSC. (Long explanation not forthcoming.)
Cried my eyes out for a whole day at work yet. (I claimed allergies.)