I mentioned the legend of restroom sofas? Wait, what's that written in panel two... Oh. That was clearly written by TC the Theater Clerk. Dammit, Te--Er, TC.
And yeah, Tedd really does just want to check things out and experience a common feminine group activity that she doesn't understand. Sarah's fantasy sequence would likely only occur to her were Tedd asked about it and felt like she was on the defensive.
Whatever illusions I might have had about relative cleanliness of restrooms faded when I worked at a grocery store in high school and had to clean them. Just... No. That is not a reality.
Commentary added for December 31, 2014