My dad has a better, more giving suggestion. Poison ivy leaves. He taught in a tough school and the teachers complained the kids would destroy their plants. My dad decided to teach the rug rats some manners (they were high school age rugrats). So being MY dad, he brought some potted plants to school and posted a sign saying "Danger. Do Not Touch." He went out of his way to tell all of his classes to be very careful and not touch.
So what did the twerps do? Grabbed the leaves. He found out when one of the guys started dancing a bit after taking leaves off the plants. Twerp had stuffed them down the undies!!!
Too funny, in my humble opinion. Esp because the ONLY ONLY ONLY plant I have ever nurtured is....poison ivy!!! I planted and grew a HUGE bed as a child. I thought it was pretty.
Susie