Yeah, consider it evolutionary appendages, left over from the TiTS fork of CoC2, which at some point was the fork of CoC1...
There is a lot of leftover functionality in the parser and the whole appearance system due to that. Some is here but does not work properly, like the many different face tags. Its a new addition, and does not exist for stuff which is not needed by any TF in the game. There is however a lot of stuff, like dicknipples, which is already supported due to it being a leftover feature from TiTS.
There is a whole philosophical debate why this stuff is not available through normal TFs already. It comes down to the devs want of: If a TF is in the game properly, then it needs content.
But stuff is subject to change. My idea of a cum-transformative was shot down by members in this thread, claiming the devs had put a 'no' on anything that changes the type of cum you produce. Even though the parser would support it.
But somewhere along the year, the hornet sting was added.
And I am a happy bee
Still... Maybe I reboot my transformative idea and see what happens. I wanted to write a "corrupted strawberry shrub", which you could encounter in the valley. Some centaur has off-loaded his cum into the poor shrub. Its berries clearly corrupted, with a faint pink glow to it. Would you take it?
that is neat. doesn't amount for much but i'd love to see that in CoC 2. And its a rather befitting decription of the item.