Commander Data gives Commander Riker the shave test, alluding to the old 70s/80s commercial where they would use a credit card or similar devices when cohorts would approve or disapprove of the closeness of a shave.
Quite the cute laugh if you know the context - see the movie ! Star Trek - Insurrection.
![](https://s2.save4k.ru/pic/4irAlqlZEkk/mqdefault.jpg)