When Dad was in the VFW he kept the post's '03 Springfields (for the salute on Memorial day) at home. One of them had a bayonet that, I swear, was 15" long! When I was little, it may as well have been a sword, and I loved to swashbuckle around the yard with it. I've still got one of the rifles, but I sure wish I still had that pig sticker.
Muffin in the shower is inadvisable since the water washes away the lubrication, resulting in chafing.
Springfield bayonets, like many of that era, had 16" blades. Originally Garand bayonets were that long but they switched to the 10" version early on, even cutting down some of the longer blades.
Ya know, come to think of it, the time span between that 1863 Springfield-pattern musket I have with the 18" bayonet, and a 1903 Springfield .30-06 with a 16" bayonet, isn't all that long a time. Though weapons tech advanced considerably in those 40 years, I guess enemy-stabbing philosophy remained about the same.