A Northern California gym teacher is facing the wrath of angry parents after, they claim, he took it upon himself to teach his eighth-grade charges his very own version of the birds and the bees without parental permission.

The unnamed gym teacher works at Morada Middle School in Morada, Calif., a speck of a town just outside of Stockton, reports Sacramento area FOX affiliate KTXR.

Parents say his sex syllabus went way beyond the parameters of what is appropriate for junior high physical education coursework.

“Come to find out, he also told the class when he got his first boner, which was very inappropriate, which is what made my daughter really uncomfortable,” an anonymous parent told KTXR.

“That is not something she wanted to hear,” the furious mother added.

The general consensus among parents appears to be that they have nothing against sex education per se. They’d just like to know about it when it happens, and give permission. As a general rule, they said they’d rather not have teachers discussing how they somehow remember a first erection, either.

“It”s shocking, really,” parent Rodger Marable told the FOX affiiate. “I mean that is something they should really be sending paperwork home to the parents.”

Another parent charged that the same gym teacher also treats overweight kids badly.

School district officials have placed the unidentified gym teacher on administrative leave. It’s not clear if the leave is paid or unpaid.

Sex education fracases come up pretty routinely in American public schools. For example, last year in a rural Idaho town, four parents objected to a science teacher’s use of the word “vagina” in a 10th-grade biology lesson on human reproduction. (RELATED: Idaho science teacher uses the word ‘vagina’ in sex-ed lesson, gets investigated)

More recently, in February, a member of Hawaii’s House of Representatives criticized an ambitious and controversial federally funded sex education program currently in use in 12 of the state’s public schools that suggests, among much else, that butts are genitals. (RELATED: Federally funded sex ed program teaches Hawaii middle schoolers that butts are genitals)

Follow Eric on Twitter and on Facebook, and send education-related story tips to erico@dailycaller.com.