When Loki and Thor were little boys they shared a room and after they got older, experimented with each other. When their mother realized what was going on then they were forced to move into separate rooms and told what they were doing was wrong and that is when they began to grow apart. After Loki fell from the bifrost and Thor thought he had lost him forever and learned of Loki’s true heritage he questioned everything that happened between them. One night shortly after Thor went and laid in Loki’s bed and realized he would never be able to hold him again and amend what had happened between them. That is when Thor truly wept.