[prompt: how many heads are too many heads?]
heads like on necks? or like, dick heads?? cus that’s very different and have very different answers. the one I assume you mean, one. one is enough.
dicks though, you can have some fun with multiple dicks. too many, i’d say it depends on size, but generally four is where it starts getting tricky from personal experience.
that is assuming it's not just like a multitude of dick heads on one dick. that'd be like, a reverse sucker. interesting idea.