Is 'showing off' normal?

Hi, I'm a 22 year old college student and I wanted to know if its considered perverted to show off oneself? I have had only two incidences in my life were I actually did so. Both were for different reasons.
The first time it occurred when I got hired by a trucking company and they sent me down for training. They had us stay in a hotel room, where we had to share the room with up to 3 other guys. This behavior was aimed mainly at a particular roommate. I wanted to know the man's orientations was. lol dont ask me, why i cared to know, i dont know myself. The guy was in-shape, 40's something and had what many would considered attractive looks. Over the course of 6 nites, I would sleep in my underwear with T-shirt to see if I could get attention. I normally slept with some sort of boxers or shorts over my briefs because they can be revealing on me because of my size, even if I'm not aroused. In anycase, I gradually and meticulously revealed more of myself every night. Which started with me sleeping in briefs and t-shirt with no sheets over me to taking off my shirt and then later letting my “stuff” hang out the bottom of my briefs, all the while snoring falsely. One night, I decided to 'make it hard' and keep it that way most of the night to see if he would see it(I had to think about my ex GF to do so by the way). I don't think he seemed to noticed most of the time until once, In the early morning, after he returned from the bathroom, he laid back down. Perhaps a few minutes later, he sat up in his bed and leaned over toward me in a crouching manner. Its strange for me because I rather don't have any interest in other guys ( I had broke up with my gf a few months before I got hired) and I don't understand why I would have a desire to do that. The part I find most perplexing is I didn't get sexually aroused by it. It was, in fact, a rather exhilarating and dizzying experience that made my heart race like crazy from adrenaline. For what ever reason I seemed to like that. He stood in that crouching position for about a minute or two and then he retreated to his bed and laid down without covering up. He laid flat on his back afterward. I wasn't sure if he was still staring or not. The room is actually smalls, therefore, he was quite close when he did this. I don't know if he liked it and I couldn't tell.
I read that exhibitionism is considered a sexual disorder that is characterized by an overwhelming desire to show off one's genitals. I don’t see how the feelings I had as being 'overwhelming'. It also read that exhibitionist like to shock people. I really didn't have a desire shock those guys, its more of wanting them to see it. I dont see much purpose in scaring people. A secondary question is, seeing how these experience happened in the presence of other guys, would I consider to be at least bi? What does everyone think? Is it normal?
Please, only serious constructive and informative comments
Thanks