The causes of evening glory are uncertain; indeed, a bout of it can spring up from nowhere. Alike morning glory, it lasts for an unknown amount of time, and can make certain situations very awkward.
One can deal with evening glory in a similar fashion to its morning variety: waiting for it to slowly descend by thinking of old women, in the hope that this doesn't spur it on, or by embarking upon that great beast of a ship more commonly known as sex. Evening sex is superb.
"Let's deal with that first, then," said Hannah.