That’s not the kind of sex education a first-grade class really needs, is it?

They say there’s a time and place for everything. Apparently, a 21-year-old didn’t know that, or at least didn’t recognize it.

The Muskegon Chronicle reports that Evan Daniel Emory will be served with an arrest warrant today for singing a sexually explicit song before an entire Ravenna first-grade classroom on Jan. 12.

According to the report:

Muskegon County Prosecutor Tony Tague said what Emory did by posting a YouTube video of him apparently singing lyrics to a Beechnau Elementary School classroom last month is “disturbing.”

“The bottom line in this case is that he walked into a classroom and took advantage and victimized every single child in that classroom,” Tague said.

Emory was lodged in the Muskegon County Jail and authorities say an arrest warrant will be issued early Wednesday.

Tague said Michigan law “provides penalty” for those who actually manufacture child sexual abusive material “but also has a provision for those who make it appear that the children were actually abused.” Tague estimates there were about 20 to 30 children in the classroom that day.

The YouTube posting, removed from the Internet late Tuesday, shows Emory sitting on a chair in front of a group of young children, playing a guitar and singing a song about having sex and doing sexual things.

Authorities initially weren’t sure whether Emory actual sang the lyrics full of sexual innuendo to the class or did some sort of voice-over editing when he posted the video.

Ravenna Public Schools Superintendent John VanLoon, confirmed to The Chronicle that Emory did not actually sing the lyrics to the class; it appears that way only through editing of the video posted to YouTube … .

Either way, Muskegon County Sheriff Dean Roesler said the video is disturbing and a “family member” of one of the students immediately alerted school officials to the video. The camera in the posted video scanned the audience of smiling children and every child’s face was recognizable.

Emory … had “informed the teacher that he wanted to video himself singing to the class as a portion of his portfolio to help him gain admission to a Big Ten School of Education,” VanLoon said.