No, it's perfectly fine. You are a teenager now so your hormones are developing more. It's only natural to have kinks at your age and be curious about sexual things.
At least you've had sex. My man and I are in a long distance relationship at the moment and we won't be able to move in together for a couple years still. We made a promise to each other that we would take one another's virginity. So, I have to wait because I love him. :3
You were only bottom first time? I'm like a pure bottom. I love receiving it. Well, I'm actually an anal virigin but I know I like be fucked more than fucking.