Why don't women find pleasure from tampons?

Now that I know the penis goes where a tampon does, why on earth don't girls get any pleasure from using a tampon, I mean if its the same opening wouldn't it feel good? Personally I find using a tampon very painful so does that mean that I will have...

difficulty having sex?

haha. Do you enjoy having your period girl. Tampons and sex don't even compete. I mean your first couple times, yeah it will hurt, but this doesn't mean you will difficulties having sex.

Your first couple of times having sex it may hurt, your vagina is small since your have never put anything up there before. The more you use tampons it will get easier and not hurt.