Could mean any number of things. Hours and hours of porn and monkey spanking would qualify. So would hanging out at bars and picking up drunken 5s to knock one out. There's only so much you can do in front of a computer screen that would **** a wife off.
But that sort of off point. Nerds playing sim games on the internet aren't likely to be a bronzed adonis. You're a nerd playing an internet sim game. And, if you're not approaching 50 and/or married, you should get out every now and then. And quit pretending that a 5 isn't better than you could ever hope to have.