[David O. McKay]
" ... President Tanner mentioned that at the meeting of the Council referred to on June 9, the Brethren had mentioned that many of our young people who go through the Temples gain a wrong impression, that they do not obtain a proper understanding of the Temple work and sometimes lose their faith by reason of the Temple ceremonies. He explained that when companies of young men and young women going on missions have been through the Temple for the first time and received their endowments, it is customary to hold a meeting with these young people after the Temple session and explain to them the meaning of the Temple ceremonies and give them opportunity to ask questions. It was thought that it would be helpful if a meeting of this kind might be held with new converts, young couples and others who go through the Temples to receive their endowments so that they could ask questions and get enlightenment regarding the Temple ceremonies. ... I also stated that the First Presidency would take the matter under consideration and appoint a committee of three to make a study of this problem."
[David O. McKay diary, June 21, 1966; emphasis in original, in Anderson, Devery; The Development of LDS Temple Worship, 1846-2000: A Documentary History, http://amzn.to/TempleWorship]