quit interrupting my yawns...

i noticed, especially at night and in the mornings, that i often interrupt my own yawns. they are interrupted with a thought, stumbling over something, or who even knows what. but seriously, why can't i just yawn in peace? i've started catching this and following through with my yawns. it's really a great feeling! everything else can wait 4 seconds for me to yawn, for heaven's sake...