I notice I can't see the male characters Dick anymore, or view the different types when changing it unlike in the last build I played, was this done on purpose? Or did I encounter a big?

You may have given your character a magic mirror which swaps him to a girl.

As a male, female, or futa, with a "Normal" (quotes because it's still big) dick or none at all, Null's boxers prevent the crotch from being visible outside of kissing high heat characters or sex. You can use a Magic Mushroom for a giant dick which is always out.