A dickneck thread with some new pics that I hadn't seen before
https://boards.4chan.org/d/thread/7591137

This quote took the words out of my mouth:

"For the people questioning why this is a fetish...

I personally like the idea of girls with a /d/-style body who try to pass as normal, and failing, being completely devastated when they're exposed. For instance, a futanari whose erection is reaching up between their breasts and peeking out of their cleavage like an odd piece of jewelry.

For a dickneck girl, they can pass for normal pretty damn well, except for one easy to overlook thing. Just imagine having to be insanely careful about everything. Even just turning your head when somebody gets your attention could cause a possibly messy orgasm. On top of that, all of the dullahan-type issues as well.

Are they constantly trying to stay erect for a more secure fit, and possibly going flaccid would result in their head falling off of their shoulders? Could you imagine having to try and keep a constant erection the entire day, without being able to release without an embarrassing disaster?"