Don't like the idea personally, even if I am just going for a quick blowie I normally dive into the nearest boozer pre punt for a quick piss
9 out of 10 punts I ask if I can use the kazi before, especially if it's an hour punt.
My regulars know this and just let me in and go and wait in the bedroom. It also gives me a chance to see what the cleanliness is like with a new girl, however, in my experience it is usually sadly lacking. The chances of finding soap, hot water, a clean sink and a decent towel are rare indeed.
I did have one embarrassing moment with a regular.
I always shower just before leaving the house and it's a 20 minute drive. As usual, went for a pre punt piss and to be super clean I made sure my cock was thoroughly dry with some bog paper. It was only when she was just about to take it in her mouth that we discovered there was a little bit of paper stuck to the underside of the old fella. I apologised profusely and explained.
On a similar topic, I've found that I get quite horny just after having a shit and often end up knocking one out if I've just had a good dump.