Definition: In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Input: Text: disclaimer: i am not trying to claim that what i did was morally right and it was probably quite disgusting, but i just want to share what happened for your entertainment. also i'm not a writer so sorry if the narration is poor.

so i'm in my last year at school, doing latin (i don't know why) as one of my a levels (exams). but at the end of last year our school's main latin teacher retired and in his place stepped in an attractive blonde girl.

every morning she asks someone to fill up her flask with coffee from the nearby shop, just before the lesson begins and i usually do it since i like to get some occasionally myself and i get in earlier than everyone else.

so one day i'm feeling horny as fuck on my way back from the shop when a dark thought enters my mind. so i go into the toilet right next to our classroom and do the unthinkable. i wank (jack off) into her coffee. i'm not quite sure why - i guess there was thinking sexually arousing about knowing that she was essentially drinking my cum unwittingly.

she didn't seem to notice at all so naturally i did the same thing the next day. and the next. and the following days until about two days ago. i had become bored of this operation, it had lost its initial excitement factor. i knew i wouldn't be caught so i was no longer interested. 

now in hindsight the thing i did next was just stupid. plain stupid. now my teacher is really hot, but she has a spot above her chin which she constantly complains about, saying she can't get rid of it. so i go home, wank into a small, unlabelled pot and give it to her, saying its a brand new spot removal cream which hasn't been made available to the public yet - this was somewhat believable as my mom does research in cosmetic science.

she thanks me and immediately puts it on. i didn't expect her to do that, i thought that she would have waited until she got home. now the following is the exact dialogue that we had.
"it's a bit sticky isn't it?"
"i don't know i haven't tried it myself"
"i can barely get it off my fingers"
"i think it's good for your skin in general, so you can just rub it in"
(massages her face with my cum)
"you know what this reminds me of?"
"no, what?"

and then began the longest moment of silence i have ever experienced. my armpits were sweating badly, my vision was going dark and blurry - like when you get up too fast, and my stomach kind of clenched really suddenly. she was staring right at me with a look of contempt that bore a hole in my soul.

"erm ... i'm not sure. i just completely forgot what i was going to say"
she knew and i knew she knew and she knew i knew she knew. i'm guessing she's taken facials before and even if she hadn't she'd still know what cum feels like.

"ok, well i could only get that one pot so i don't know if i'll be able to give you any more"
"that's ok, i don't think i'll need it. anyway, the bell's gone so sit down and let's start."

yesterday she didn't show up to our lesson. we were given a cover teacher but there was no explanation. i don't know if she's still working here anymore.

TIFU by putting my cum where it doesn't belong