That sounds/looks hot. Does that substance cause anything in you or the person who drinks the piss? That's my only concern. Then again, it went through you, and presumable the next person, so I assume it can't be bad? Why do you take it (if I may ask)?
The only thing personally to me: this is something I'd wanna know ahead of time, if that just happened w/o knowing I'd be scared AF what could be going on. But if I knew ahead of time? sign me up, sure.
I'd probably just roll with it if it were a surprise but it'd put me on edge and I'd want to ask or search that up, or feel odd about it the whole time until knowing the situation...
Off topic, and I'm not sure of the toxicity, but I've seen folks crack open glow sticks and rub that stuff around / on them (in the dark, with it all glowing). I've never seen someone jackoff or fuck with that stuff but that sounds like it'd be plenty hot. A glowing dick going in you? Lube me up I don't care what happens.