Original sentence: Missionaries may have ongoing romantic heterosexual relationships with persons residing outside of the mission, but missionaries are prohibited from meeting with them or telephoning them while serving their missions.This can, of course, lead to a "Dear John" letter
Edited sentence: Missionaries may have ongoing romantic heterosexual relationships with persons outside of his or her mission, but missionaries are prohibited from meeting with them or telephoning them while serving their missions.They also write to family members and other relatives by either postal or electronic mail.This can, of course, lead to the dreaded "Dear John" letter, since the missionary is not dating, but their romantic love interest back home very well may be