In rugby union why is it called into touch?

Question

In rugby union why is it called into touch?

Answer 1

Two line on the side of the field is called the touch line, ones you "touch" any of these two lines while you are in posession of the ball. The game stops and it's become and opposition line out.

The same counts for when you kick the ball, except if you had been awarded a penty.

Answer 2

In touch is a term held over from ear;y soccer days, when the ball is out of bounds you could use your hands...i.e. touch the ball

Answer 3

touchline:

noun [C] (US sideline)

one of the two lines marking the long edges of the area in which particular games, such as football, are played:

She spends her Saturday afternoons standing on the touchline, watching her boyfriend play rugby.