Dedicated wife....... I'm sure someone will ask later..... Rusty trombone is a euphemism for a sexual act in which a man stands with his knees and back slightly bent, with feet at least shoulder width apart in order to expose the anus.[1] The other partner typically kneels behind the man and performs anilingus while reaching up beneath the testicles or around the body to masturbate the man, mimicking the motions of a trombone player.[1][2] The act is defined primarily by the physical orientation of the partners and the combination of analingus with manual penile stimulation; however, other positions and variations are possible.