Someone can tell me how can make my hair become straighten without going cutting my hair (boy)?

Some guys do use flat irons. Hairstylists use them on a lot of guys that are on TV. They make smaller ones for short hair. You can buy one at a beauty supply store. A regular perm without rods will relax hair a little but usually won't make it totally straight. A chemical relaxer applied by a stylist will also help but can be damaging, and you still may need to smooth it some with styling depending on how curly your hair is.

Someone can tell me how can make my hair become straighten without going cutting my hair (boy)?

use a straightner

Someone can tell me how can make my hair become straighten without going cutting my hair (boy)?

The same chemicals used for a curly permanent can also be used to straighten hair.

It's a two part process. The perm solution breaks the molecular bond in the hair shaft so it can be molded to another shape and the neutralizer reconnects the molecules so that it stays in that shape.

So if you use curlers before applying the neutralizer the hair will come out curly, but if you comb it straight the hair will remain straight.

If you want something less drastic try an Ionic blow dryer and a round brush, it works like magic but of course it's not permanent. I'm not sure how well it works on really short hair, though.

Someone can tell me how can make my hair become straighten without going cutting my hair (boy)?

Blow dry it when you get out of the shower, upside down, and then run some gel through it.