Welcome to the forum roofish. It's a good question you have asked, I have never given it any more thought than dependent upon the tyer certain lengths may be more comfortable. I don't know if Laurie reads any other posts or not, but if you went to one of his, he probably would be the best bet for an official answer.
Socialism is for the people, not the socialist. You don't think they would subject themselves or their families to the wonderful things they do for us...do you?