ZZ Top guitarist Billy Gibbons describes this song as "The closest thing we could attempt to attach to a collegiate level of consciousness." In a 1985 Spin magazine interview, he explained: "We were in Aspen. I don't want to go into too many details about this. It was a skiing weekend. I stayed in. I had just gotten off tour, and getting up at seven to go get cold is not my idea of a vacation. Nonetheless, I was stirred to life to the tune of this friend of mine shouting. 'Oh, full wood!' A friend of ours was descending the staircase with this gorgeous, voluptuous blond. They were going to check out the skiing conditions. I said, 'What do you mean, 'full wood'?' And he said, 'It was the grossest thing you ever saw. These two coming down the stairway, and he's got full wood.' Then it kind of clicked and I said, 'Don't say another word.' It was classic. Full wood. I guess you might have 'half wood,' too."