Questions: Health & Fitness

Someone today asked me, if I work out and eat always healthy, because I remain skinny. Why people are so simple-minded?

I absolutely hate fitness world and don’t work out at all, and I hate the healthy diets with all my heart, so I take it as an insult.

Just because I’m skinny it doesn’t mean I’m a health-freak. I hardly consume any “fresh” food, and I drink 500-750 ml of soda/energy drinks per day on average, and consume alcohol thrice per week or so.

And I’m not the only person who does this. My cousin is thin as a stick too, but he doesn’t follow a healthy lifestyle as well. He smokes 15-20 cigarettes per day, drinks energy drinks and consumes alcohol often.

We are 24-25 and 22-23 respectively, by the way. Not teens.

So why many automatically think skinny = health-freak?

I am facing a massive hair fall. Every day I wake up, I find so many hair on my pillow. My room, bathroom, my hair are everywhere. I sleep late and live a stressful life. But I don't think that's the only reason.
I've heard that biotin helps. Are there any side effects or is it useless? What do you think?

If you don't know what it is, it's when you wash your hair without shampoo. I've started this to some extent where I'd use shampoo only every other day and it's been pretty good for me. I'm thinking about just not using shampoo completely but wouldn't my hair get oily/greasy? Anyone have experience with this?