The longest ever was probably when I first found EF. I must have spent the night just looking at everything, signing up, checking out the forum and reviews. Feeling amazed, delighted and intimidated all at once. It's like when Willy Wonka lets the kids into the factory and they're all star-struck, but instead of chocolate rivers and Oompa-Loompas EF has dildos and lube.
Since then I've lost nights on here. It's just so fun once you start!