I'm not sure the addition of genitalia, even if its sole function is to be subsequently removed by player actions, is likely to help the game, really.
We aren't getting genetalia, just a tag linked to a body part that gives you the option to sterilize an animal at the farmers workshop:
Today saw the addition of an oft-requested feature -- the ability to geld! We stayed away from new parts, but there's a body part tag for it on appropriate male critters, as well as a job and so on. The job takes place at the farmer's workshop after the animal is designated in a way similar to slaughtering. The process is modeled with a wound within the existing framework.
All breeding also occurs within touch range now, though there isn't a new activity for it or anything. Some more tools for breeding and animal population control are now in place. Due to the raw changes, it won't be available in old saves without tweaking the raws.
To avoid having to create new bodies for the males, there was also a small addition to the raws to allow body part tags to be added/removed after a caste has bodies. It only works with the simple tags like LOWERBODY/STANCE/SIGHT/GUTS/etc. rather than tissue flags at this point, but it's useful for a few things. For example, after declaring the male caste, [SET_BP_GROUP:BY_TYPE:LOWERBODY][BP_ADD_TYPE:GELDABLE].
That string at the bottom is presumably what you would add to a caste's entry to make them geldable.
And like it says; not necessarily getting spores anymore; pregnancy occurs after a male comes near enough a female to touch her, but mating isnt an activity that can happen; pregnancy just occurs from wandering about bumping into each other.
However that tag should also allow us to muck about in other ways with body parts on a specific creature or caste of creature without having to make quite as many new body definitions. Which is awesome.