Awwwwh! Are you sure? I'd be fun to do it with someone else too. [[Geez, in this line of threads, 'do it' could imply so much more. But, this is her BFF so, she's just looking to have fun with the only person she can.]

It might even help with your fighting and stuff! Being all flexible and agile can help you dodge and stuff! But, if you really really don't want to...