The book opens with a vivid description of the turbulent river along with the boatman, before regarding the bridge.
I do not have anything against anyone doing whatever turns them on, but to label these activities as 'tantric' is actually a joke. https://Dptotti.Fic.EDU.Uy/mediawiki/index.php/Diyarbak%C4%B1r_Escort_Olgun_Gen%C3%A7_Bayanlar