YMHC has a rule that all players are allowed to request one other friend to play on a team with. This rule is in effect for two reasons: a) to primarily ensure proper team balance and (b) to avoid cliques and encourage new friendships. As part of this rule each friend must also request each other in order to avoid "daisy chain requests" (e.g: Mary requests James who requests Bill who requests John), and also to ensure that we are not caught in the middle of having to make tough decisions (e.g.: what do we do if Jim requests Sue, but Sue requests Bill?).
We appreciate your understanding on this issue.