Can kissing an having sexual activity with someone who smoke weed cause me to fail a hair follicle drug test???

See below: It is not the kissing or sex, but being exposed to secondhand smoke of weed that could result in your failing a test. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Get HPV and Covid vaccines. Wish you good health!