He is a lucky servant being allowed to touch her Mistress cunt while she is pissing his mouthole... I suppose he was severely punished later for having spoiled some of her precious liquid!
My wife trained her PC muscles in order to urinate in spurts, mouthful after mouthful until her bladder is empty. She usually prefers to only give me several swallows and then positions herself over my cock and balls, and finishes me with a golden shower on my genitals.