Attn: huge back-of-neck zit

i am taking a highly educated guess that this was caused overnight because SOMEONE WHO SHALL NOT BE NAMED laid his 3-days' unshowered head on my pilow but two nights ago. :(
 
couldn't you have just taken the pillowcase off of the offensive pillow? and also: how do you know you used the same side of the pillow that the offending person used and not the side of the pillow which most likely was laying on the floor which consequently could have aquired grease or dust from the unkempted-ness of your carpet.

just an educated guess