The first time I had the bright idea of getting my 105 lb. GSD in the tub... let’s just say it wasn’t pretty. I was more wet than he was. Then, I got him in a DRY tub and then filled it with water. Silly dog was happy then! I, however, smelled like a wet dog until I got into the shower.
...unless soap is involved. Shampoo is to him what Holy Water is to vampires. The SOP now is for me to let him outside while I discreetly fill the tub, change into a pair of swimming trunks, coax him into the bathroom, lock the door...
...and wrestle.