It’s like the left and right Twix chocolate bars.
Don’t worry, they both taste the same.
That’s insane what you just said. I gag at the very thought of a left Twix.
Do they go into both holes? But that should be front and back rather than left and right…
You can put them into any orifice you want! (They may not taste the same after that, though)
However, one is capable of containing more of that delicious gooey filling.