Allen (Texas) High School students first noticed the scandalous pictures on a magazine in the background of a photograph in the Deutsch Aktuell textbook, WFAA-TV, Dallas reported Tuesday.

"We were actually doing a class reading and a few students noticed it and started giggling, and the teacher caught on and the whole class knew," student Joshua Sabik said.

"Oh, it was obvious ... Naked women, breasts, right out there in your face," Joshua's mother Desiree Sabik told WFAA.

Education officials said the books, which have been in schools since 2005, may be banned from classrooms or kept in use with a sticker covering up the saucy photo.