I had a peeing fetish before I met my first wife. Initially convinced her to pee her knickers on the loo and some time after she was sitting on the floor at her house when I asked her. She just lifted her skirt and peed her knickers and sheer tights. Left a massive damp patch on the carpet. Next morning her dad said he could smell pee qnd presumed it was the female dog they had. We sympathised with him.