Thanks!
No problem. I also have this, but it's just a shop:
http://i41.tinypic.com/zx660z.png
I've revised my plan to keep you out of prison. Call a truce, bro love is a strong thing and you can't let it interfere with your friendship, right?
So give him the box of chocolate you bought for her, tell him to give it to her instead, apologize for being pissed and shrug it off.
Let him give her the laxitive chocolate, you want something creamier then regular chocolate, maybe brownies because you can just tight plastic-wrap to re-wrap these, melt the exlax chocolate bars up in a pot so its like sauce and just paintbrush it on then put it in the fridge to cool off. He'll take the blame, you can also get non-chocolate versions to mix into other food, it's just one way this stuff is packaged.
If you're buying actual store chocolate instead, go with the belgium stuff that has creamier chocolate in the center. Foil-wrapped is probably going to be a bitch to re-wrap though and I doubt you can get a proper syringe that'll be able to extract regular chocolate and re-inject laxitive(though you do have a diabetic with supplies).
Cake & Icecream works better because you can mix it into batter but you're likely to have a harder time making people eat that, or making them take it out to a date. There's liquid stuff that you can probably mix into drinks but I don't know how hard that is to get.
You seem well versed in the art of baking products, chocolate and REVENGE. Please, tell me more.
I'm well versed in baking and cooking because I took culinary training school for 2 years during high school. I'm not really well-versed in revenge, but we did a lot of this shit to each other in high school to people.