I don't think he literally suggested using a blow torch
Otoh, I've heard stranger things than that from people who work in boat stores...and even stranger things from boat owners.But yes, almost all hoses need to be heated a bit to soften 'em up enough to expand to go over a hose. A hose that goes on TOO easily won't seal. Some people like to use boiling water...I've found a blow dryer to be the easiest and safest way to warm a hose enough to get it onto or off of a fitting...use a heat gun only if you really know what you're doing with one, 'cuz overheating a hose will damage it. And I prefer K-Y to dish soap as a lubricant...much more slippery, and just as water soluble.Btw...never heat a hose to make it bend tighter than it wants to bend willingly. Forcing a hose to bend more than it wants to can stretch the "skin" on the outside of the radius enough to tear it and can weaken the inside of the radius enough to cause the hose to kink. Instead, break the hose and use an inline radius fitting...or replace a straight toilet or tank fitting with a 45 or 90.