Bathroom humour

I knew I shouldn't go bouldering today but addictions are like that and I pulled a muscle in my shoulder. Not good news a week before the summer holiday. The labs with the motors are going well, the students are coming up with lots of varied research questions. Can't always be sure if the students will latch onto an idea or not. Tried giving the class a slab of strawberry jelly last christmas to see what interesting physics they could relate to it. Not much happened, they didn't even eat it.
Walked up to the book as usual but had to make a quick return due to urgent need to go to the toilet. Being caught out like this is one of those no win situations, you have to get home fast but if you run the desire gets stronger (must be a research question in there somewhere) so you start running but then have to walk a bit till the desire subsides. What you have to do is run whilst moving your upper body as little as possible, wheels would be a distinct advantage here. I have always thought it strange the way Americans call the toilet the bathroom, I suppose it started because it sounds more polite but now it's not so polite since bathroom has got a new meaning. If I ever go to the states again I have a desire to say I'm going to the bathroom, then go there and have a nice long bath. I suppose instead of "toilet humour" in the states they have "bathroom humour", just can't see what's so funny about soap, plugs and taps though.