Remember Gus Grisom bring along a bunch of trinkets so that they would be "valuable" upon their return?
THe guy smudges with sage prior to lift off to ensure good luck. Hey, why not...rockets are not a sure thing, so why not all the good luck?
Heck, Buzz Aldrin took a cup and a wafer. The first thing he did after he and Armstrong landed on the surface of the moon was take communion...