Hair without follicles from both the father and son is submitted for testing (the barber of the former sells clippings while the latter snips his own hair, doesn't pull it out by the roots). While hair without follicles can be tested, the process is not easily available to general public. The son is shown mailing the samples into the lab in the usual manner.
I Hate Kids (2019) is an American adventure comedy written by Frank Dietz and Todd Traina, directed by John Asher and starring Tom Everett Scott, Tituss Burgess, Julian Feder, and Rachel Boston.