Oh if we're talking about getting piss into a gentlemans asshole, then we are definitely leveling up.
I ordered a collapsible silicone funnel (with a tiny tip the size of my pinky) to help with this endeavor. The only thing about regular kitchen funnels is that the tips tend to be about an inch long, and depending on the asshole in question, a lot of piss can come out as it's going in.
No matter, I love a nasty scene, and trying is the fun part
On the other hand, my most favoritist toy for boofing piss (look up boofing if you must) is the Ox a Balls Flush Through dildo. I have it in red (I do love red)
It's great for getting the piss where you want it, and it's also a great funnel if I want to make someone (or if that special someone wants to) drink from a dick.
One drawback, if you could call it that, is that the Flush Through is almost the size of my forearm. So it's really for the size queens out there
I also have a pig hole, which is a hollow butt plug that acts as a bridge to keep an asshole gaped. This is good for pissing and spitting, if that's your thing