You, don't. It's a whole side quest where you make him become a girl through odd animal transformations and work them up to basically being an anal slut. Also, it's optional.
At least you acknowledge the effort instead of bashing the content. Wish more people would be like that.
I myself am a fan of all of this. Look forward to each update.
Good luck to you in your endeavor. It is a bumpy road for most and hope for your success. Many projects once lost on this site could use a resurrection, and a successful one may bring that about for some.
I remember this game from a bit back. I remember being disappointed you couldn't work a threeway with the redhead mother and daughter neighbors. Other than that, it was pretty good for the time. Have to look at how it is completed.