A Cum Artifacts are objects that have acquired online infamy due to having semen as a major part of them.
The most infamous Cum Artifacts are The Pony Cum Jar, The Cumbox, The Cumconut, The Cum Arm, The Jizz Powder and The Cum Dreamcast.
Mom: Hey Johnny, what is this bottle filled with milk i found under your bed?
Johnny: Ma, that's not milk...
Mom: Johnny, are you making Cum Artifacts again?