Like I said, they are probably here to serve…
you up as an entree!!
Some say that humans have been a popular epicurean delicacy for aliens ever since that classic 1962 Twilight Zone episode. They don’t harvest humans straight up, however, as it would cause too much attention for humans to disappear altogether. They may abduct certain humans, and then clone the ones that match their dietary criteria and grow them for the meat and by products, then release the original.
Ancient alien researchers suspect this to be the case. 