Is it normal to be this impulsive?

I almost always act on my thoughts. Some examples: I wondered if I would be able to play the guitar, so I bought one without thinking it through and learned myself how to play it. I also wondered if I would be able to make a Rubik's cube, so again, I bought one and learned myself how to make it. I am a very impulsive buyer and I could give you a lot more examples of that.

But now the more negative examples. When I was younger, I was once standing in front of a fire. I wondered if the fire was on, so I just placed my hands on the fire (it was on btw). I also once almost jumped off a building. I was really at the point of doing it, not because I was unhappy, but just because I was curious about how it would be. I was really battling with myself. Another example: I wondered how it would be to kill an animal. So I just held my goldfish above the water until it died. I don't feel sorry about it.

Even if I think 'I'd better not do that', I almost always end up doing it. Curiousity and a big urge take over. I feel satisfied after doing what I thought of doing. I could give a lot more examples, and they mostly are quite negative. Is it normal to be this impulsive?