Title: → Challenge Accepted
Rating: → M
Pairing/s: → Derek Hale/Stiles Stilinski
Summary: → Stiles never could resist a challenge.
Warnings: → None
Word Count: → 877
Prompt:: → Prompt: #422:Pyrrhic Victory @ tamingthemuse
Author's Notes: → For those who didn't watch 'How I Met Your Mother', the slap bet is explained here and suffice it to say that Barney Stinson never met a challenge he would turn down!