Are they just saying hello?

Question

when they do the whole group bum sniffing thing...?

Answer 1

In the sports of rugby union and rugby league, a scrummage or scrum is a way of restarting the game, either after an accidental infringement or when the ball has gone out of play (in rugby league only). Scrums occur more often, and are of greater importance, in union than in league.

In both sports, a scrum is formed by the players who are designated forwards binding together in three rows. The scrum then 'engages' with the opposition team so that the player's heads are interlocked with those of the other side's front row. The scrum half from the team that did not infringe then throws the ball into the tunnel created in the space between the two sets of front rowers' legs. Both teams may then try to compete for the ball by trying to hook the ball backwards with their feet.

Answer 2

Funny! It is called a scrum. Al most the same as when you Americans are standing bums in the air growling at one another.