Seeing as the boutonnière I wore to my "prom" (we call them "formals" down here) pierced my jacket then flesh and went straight for my heart, I'm 100% down with alternatives to small fake flowers adorned atop enormous metal spikes.
Like these Minecraft swords. Tacky, perhaps, but much safer.
My friend and I decided we didn't want to do the old "corsage & boutonniere" for prom, so we got these instead. [Reddit, via Mein Craft]