What a face the father has when his son wants him to explain that it is a blowjob.

My mother is working and my father as always watching over me at home. suddenly go into the bathroom while i'm naked. we argue a bit and then he leaves. i want to take revenge on him and something very funny occurs to me. i tell him that if he can help me that my back hurts and while giving me a light massage i tell him that if he can explain what a blowjob is, my friends talk a lot about it and i don't know what to say. the thing gets but very interesting when my father not only explains what it is but he gets on his knees and starts sucking my dick.