here is the x-ray shot that  Fenrisulfr did and here is another story.

Story: After the blue wolf removed his pants, Wolfy happily wriggled his way down Fenrir's throat and plopped into his belly. Squirming lightly, the little wolf settled in as his captor made use of his jeans and wandered off, content with his full belly.

so now i am kinda of relax in Fenrir belly and he still have my pants*^^