I've taught all my kids to ALWAYS recheck any gun handed to them. When my older Son was looking for a pistol, we handled a number of handguns at several stores. One of the salesmen did make a comment about the rechecking and said that very seldom do customers show that level of caution. Apparently, some of his customers were less than optimal with their gun handling.
This Son was greatly offended when he went to a BPS gun counter and they refused to remove the trigger lock so he could actually hold a handgun in a normal firing grip.