True story.
1984. I'm 14, and I LOOOVE D&D. So much so that I'm pathetic enough to occasionally run solo games for myself at night in my bedroom (thank you 1e Random Dungeon Tables)---instead of doing homework.
Anyway, because of a number of issues (mainly, I'm not doing my homework), I drop a full GPA point in one semester.
Needless to say, my dad freaks out and starts screaming at me, "What the **** do you do in your ****king room every night? Play with yourself?"
So, thinking he's talking about D&D, I answer, "Well...yeah."
I'll spare you the rest of the conversation, but suffice it to say that my grades improved (and it turns out that putting a steak on a black eye really does keep the swelling down).
/Wormwood's second favorite D&D story.