3 days later…
The Doctor had landed the TARDIS in the 1770s near Monticello. He walked towards the doors when Rose stopped him.
"Doctor," she started.
"What?" he asked.
"Shouldn't you go to the loo first?" Rose asked.
"No, I'm good."
"Sure? It's been three days. And we are in colonial times."
" ´Course I'm sure, yeah. I was here for the tea party, I was fine. There have been some advancements in 200 years. Mind you, drinking all that tea..", "Oh, all right then" said The Doctor, surrendering to Rose's suggestion. He walked down a corridor to the toilet.
Later, they met Thomas Jefferson, who was writing things to say to the French, to help their revolution. He made a note of the fact the Doctor didn't use his bathroom upon arrival, as he had before. "Rose," he explained, and that was that.
"Reckon she can keep from repeating the barrel incident, eh Doctor?", Jefferson said with a chuckle.
The Doctor blushed and closed his eyes, prepared for the worst, upon having THAT story brought up.
"What barrel incident?", Rose asked, with interest.
Thomas Jefferson looked to the Doctor for permission to tell her. He waved his hand dismissively. Thomas Jefferson started,
"Two years ago, as you've probably learned in school, we threw the tea to the fishes up in Boston. Your Doctor, with a different face than you've seen, I think, helped out. Back then, he was a quite avid drinker, specifically of our American-made whiskey. Hence, as nature dictates, he found himself in the unfortunate situation of bursting for the lavatory with none in sight. A man of discretion, he found an empty single gallon-water barrel, broke off the tap, put his flagpole in, and proceeded to urinate into the barrel, filling it completely, and throwing it overboard. Then he kept pushing boxes as if nothing had happened." At this point, the third President of the United States almost fell off his chair with laughter. Rose laughed heartily with him.
"That's what you meant when you mentioned drinking a lot of "tea", wasn't it?" Rose asked dubiously.
"Yes." the Doctor admitted.
"Well, good to see you didn't miss the very important lesson," Rose noted. The Doctor nodded in embarrassed agreement.
"Indeed," Jefferson added, smiling.
They proceeded to have a lovely chat about the Revolutionary War, with the Doctor ceasing his embarrassment, instead thinking fondly of his old luscious locks..