It is not that any type of cooking oil is going to be harmful to your asshole or inside of your ass.  You COOK with those oils after all and eat them.

The problem is it can interfere with the excretion process.  Things go too quickly.

If you remember the fat-free cooking oil that someone created several decades ago, that was used to cook things such as potato and corn chips, many people experienced a side effect that such foods would go very quickly through them, because your body could not absorb this oil. (That is what made it fat-free!)

Which is why food companies stopped use this oil to cook foods.

The TRULY SERIOUS problem with any oil or petroleum-based lube is that they weaken latex.  In other words, you NEVER want to use an oil-based lube in you are using a condom, because the oil can make the condom break much more easily.

But health-wise, remember that Crisco (the solid lard) was used for many decades for anal intercourse – and in particular fist-fucking.

By the way, the solid Crisco makes the most wonderful and tasty pie crusts.

. . .

You're thinking about Olestra. And yes, it had very disastrous consequences. Consuming Olestra gave people cramps, really bad gas and diarrhea. If you Google around, I'm sure you could find some funny meme or video related to it.

That being said, I'd be careful with what you put in your butt, but a small amount of canola oil shouldn't be too detrimental.

The problem is it can interfere with the excretion process.  Things go too quickly.

If you remember the fat-free cooking oil that someone created several decades ago, that was used to cook things such as potato and corn chips, many people experienced a side effect that such foods would go very quickly through them, because your body could not absorb this oil. (That is what made it fat-free!)

Which is why food companies stopped use this oil to cook foods.

The TRULY SERIOUS problem with any oil or petroleum-based lube is that they weaken latex.  In other words, you NEVER want to use an oil-based lube in you are using a condom, because the oil can make the condom break much more easily.

But health-wise, remember that Crisco (the solid lard) was used for many decades for anal intercourse – and in particular fist-fucking.

By the way, the solid Crisco makes the most wonderful and tasty pie crusts.

. . .

I was looking it up on google too and the sites were just selling regular lube or were for what happens with the canola was used for vaginas.  Stuff they said was that it doesn't slick up as much and something about closing pores?