Current kink - mature female piss

As a married bisexual man most of my sexual thoughts are focused on cocks but every now and again I will go through a phase of getting off to straight porn and fantasies. Recently I've enjoyed watching men being pissed on by women. The thought of a woman straddling my face, pulling her labia apart and gushing hot piss into my mouth and all over my face really gets me hard. Especially a mature woman.

I used to have a girlfriend who let me watch her pissing but that was as far as she was prepared to go. My wife won't even let me do that - the boring cunt.