Hypothetical Situation... The reccommended tube size is 1.75".... I am curious to know why someone would get a 1.75" tube when they could just get a 2" and not have to order more than one tube.... If someone is only going for girth gains.....cant they just use a bigger tube and keep using it till it's packed? From the things I have read on the forums....it seems that for some reason this is NOT true, but I have not found an explination as to how this works. Any takers on this one?