Can be used in two ways:
1. Describes a sexual act that could have occurred between two close friends as they share a shower together while one person is supposedly reading the Economist, or
2. Describes the use of a completely non-sensical excuse to explain why a guy and a girl were in the shower at the same time.
"Hey..we knocked on the door for like 15 minutes and no one answered..where were you?"
"In the shower with my friend."
"I was cold, so I decided to sit in the bathroom and absorb the steam, and so I was reading the Economist while I was there."