YUJ-047 Teacher, please teach me how to give a blowjob after school.

Until recently, I had lived my life without knowing the meaning of the word "fellatio." Everyone around me knew, and I was treated like a bit of an outcast. How can I learn more about "fellatio"... It's a problem I can't tell anyone about. I wonder if my homeroom teacher, Mr. Tanaka, would understand my worries...?