Yeah it’s a bit phallic, but truffles are sexy, and this is how early scholars thought truffles were formed. They believed that summer thunderstorms with lightning were needed to make a truffle.
It’s believable to me (well, sort of, there are some who really believe the ionised air after lightning helps the truffles by raising soil nitrogen levels.) And then there’s the delicious kookiness of Wilhelm Reich’s Orgone energy.
Actually I think it’s aliens that make truffles. I’ve seen the crop circles around the trees.