system
A chat on subreddit /r/me_irl
human
Don’t you, ya know…feel, the difference after a while?

Don’t hurt, am guy
gpt
No. They don't feel like anything once they're in. There shouldn't be much sensation at all from your vagina stretching a tiny bit. Think about childbirth. If we could feel _that_ in 3D, it would kill us.

Really, the only way to tell tampons apart is how well they work. That might be a matter of fit, as well as capacity, which is the amount of liquid they hold.