There exists a fetish- a butt plug fetish (but plugs help stretch out the rectum and keep it prepped during extended foreplay for anal sex). They come in many sizes, shapes and colors to fit every odd sexual kink in existence, there are even butt plugs with tails attached. Raph is currently holding a butt plug with a pony tail on it, insinuating that because he called Donnie a Magical Unicorn, he may as well look the part- a unicorn needs a pretty pony tail so he got Don one. Basically, Raph is suggesting they have some seriously kinky sex. While Donnie may enjoy his share of kinks, he does not wish to be a unicorn.
There exists a fetish- a butt plug fetish (but plugs help stretch out the rectum and keep it prepped