What do you mean doing the things before you showered?
When i see a girl, i had showered within the past 45-60 minutes. I literally go from the shower, to the car, to the spot. Unless you're running to the incall in 95 degree weather, you are still fresh.
I have never had a girl complain to me when i decline the shower when i show up. The times i have seen providers at hotels, i show up, she opens the door, immediately hugs and kisses, pulls me in and the fun starts. Usually there's lots of playing before a shower is even offered. 10 minutes of fun can go by and the girl will ask, "shower?" and i say no, then she's like ok good, or just saying ok. And we continue.
But of course if a girl insists i have to shower upon arrival, out of respect i will.