I am a slutty substitute teacher teaching a class of all boys. I walk in and apologize that their teacher isn't there, and ask the class what the subject is. They tell me it's female anatomy. I thought it was a math class, but I listen to the students and ask what subject they left off in the last class. They tell me they were talking about female breasts. I begin explaining that some are small, some are big (like mine), but regardless of their size, they are there to make milk. While explaining this, I'm groping myself, and notice some students getting an erection, so I need to remind them this shouldn't be sexual as breasts' main purpose is feeding the newborn. A student asks for a demonstration, so I pull down my clothes and begin spraying milk all over the place (including the students). Now all of them have erections and pulled them out. I tell them again it shouldn't be sexual, but I can't resist the size of their cocks. I explain likewise brests, if a cock is well stimulated they spray milk too. As soon as I say that they give me a bukkake. Once all of them are done I straighten up my clothes and stand back up in front of the class. I tell them that next week, we'll be talking about the vagina, and dismiss them.