Hey Evolute, Welcome to the forum!
Maybe he is only smiling? <img src="/ubbthreads/images/graemlins/wink.gif" alt="" /> <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />
Or maybe he smelled something stinky?
. . .Maybe he just passed gas? <img src="/ubbthreads/images/graemlins/ooo.gif" alt="" /> <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />