Is it normal being older i still get punished?

Okay, so, common logic just hit me. Have you ever been spanked, slapped, or whatever by your parents when yall being bad apples? Well, im a teenager. And didnt relize this, but, ever scince i was young my 2 older brothers would spank me and slap me and hit me when i was being bad or even agresive. I was what you society would mow call a demon child but im past that. Like, my parents died in a plane accident and they always said, if anything happenes that i go to them. My brothers belng over 21 then can take care of me. Now they are 31 and 25. And im the young one. The last one. So, basicly, i get punished but not for like being bad or yelling, but mahbe even dropping a glass or making an honest mistake. They hit me, not to bad to seriously hurt me, but some random slaps and spanks and smacks on my chest and hips/thighs. One time, they got drunk, and they touched me and roughly hit me along with forcing themselves on me. They i geuss never meant to, but scince that incodent 4 weeks ago, they e been getting a little more touchy. I dont know if being punished is that they are scared to let go of the young child i once was, or they enjoy it. And i dont know if because theyve forced themselves on me, they can get closer. It doeant hurt me to to much. And for the mosf part there cool fun and protective brothers. I just dunno