A Melbourne Pentecostal megachurch teaching Year 7 girls that too much sex could put them at risk of becoming like overused sticky tape has apologised for the material.

In a statement released late Friday afternoon, CityLife Church executive minister Peter Leigh said: "In response to recent media coverage relating to CityLife Church … we apologise and agree that this material should not have been handed out to students."

"We accept responsibility and a full review of the program and material is underway."

The Education Department has launched an investigation into why Fairhills High School in Knoxfield in Melbourne's outer east, has offered a program teaching a class of young girls that a chemical released in females' brains called 'oxytocin' made them more needy than boys.

A booklet given to the students said that "girls are needier than guys in a relationship and always want to be close" under a subtitle 'Science & Facts'.