Do pre-punt-preparations count?
Often after taking Viagra it gives me dodgy stomach, and that combined with a little anxiety right before meeting a new girl means I'll need to take a pretty horrendous dump before I get there. You know like the kind you have the morning after the night before where you've had a heavy drinking session followed by a kebab. Since I don't want the embarrassment of leaving a bad smell in a WG's toilet, I'll often just sneak into a nearby pub to do it or have a McShit in a McDonalds right before I get to her place. And I don't even buy anything, just enter, leave a fucking mess and stench in their bathroom and then leave.
I have this other thing I do where I will use mouthwash right before the meeting (on-route as I'm always rushed to get to whichever WG I'm booked in to see), then spit it out in the street. One time some bloke asked me for directions whilst I was on a punting-mission, in a hurry to get there, had just taken a big swig from a bottle of mouthwash in my pocket and was swooshing it around my mouth on-route. I had to spit it out on the floor and then gave him the directions he needed. I guess he probably thought I was a bit of a fruitcake but at least he had a funny story to tell his wife/partner when he got home.