It's hard to say what's sexy and what's not sexy, when it comes down to having a sexy hairstyle because everybody has their own opinion about different things. For example, if you like oranges doesn't mean that the other person like oranges as well. They might like something else. And there is no such thing as having a bad hair style either. For example, some hairstyles will look good on Brad Pitt but the same hairstyle won't look as good as on Matt Damon. That's because all of us have different face and body structure and some hairstyles might suit us and the others won't.
I personally don't comment on people's hair styles because sometimes you can offend them quite easily. The best way to find out if you have a sexy hair style or not is by asking the opposite sex.That's right. If you have a girlfriend, ask for her honest opinion to see what she has to say about it. Another way to find out if you have a sexy hairstyle is to see if you get any compliments when you go out. Usually if a girl starts flirting with you, they will tell you something about your appearance. And if they do talk about your hair means that you do have a sexy hairstyle.
Having something different than others doesn't make your hairstyle sexy. A sexy hairstyle is not what you like. It's what other people like. A sexy hairstyle will get you noticed, or even attract other opposite sex. If you're planning on going out, I would recommend that you do your hair and make them look good, because you never know who you're going to meet. So always look your best.
Keep your haircut nice and clean. Go with the haircut that suits your face structure. Your hairstyle should be age appropriate.