We have humorous thrash metal band anthrax so why i can't do normal melodic death metal, but with humorous lyrics? I mean like more humorous than comedy but with a bit of comedy in it. Do you think it's a good idea? Cause i cannot just simply write any serious lyrics, but i have some humour today haha. Sorry for english, but i'm from poland

Dethklok is one of the most popular metal bands in the history of the world and they are melodeath + humor.

Crotchduster falls into that as well.

Terror 2000's "Wrath of the Cookie Monster" comes to mind, complete with Speed from Soilwork on vocal duties and poking fun at both himself and metalcore bands:

Lyrics:
I'm a cocky little kid with a metal band
I'd like to be a star, I got my haird dyed black
And I just got a brand new guitar.

I stole some riffs from a cd today
I think it was At The Gates.
I blend it up with my personal taste
My friends got totally amazed

Chunky riffs and some cookie monster vox, will be enough to get us signed
Sony music is looking for a band, dude I think I got a plan
In Flames and Soilwork have just sold out, and one of the singers is getting bald
My time has come, I'm gonna be a shooting star

So don't step in my way
My rules must be obeyed.

I stole some riffs from a cd today
I think it was At The Gates..
I blend it up with my personal taste
My friends got totally amazed
Our sound is totally new, such a gift to the world!
My piercing looks nice in the corner of my mouth, I got it from a hot topic girl

I'm really such a sensitive guy
I'm scared those macho riffs will fuck up my style
So please take a look at me, I want to look so mean
I'm ready to take on the world
And all my friends, they agree!

So don't step in my way
My rules must be obeyed

Gonna be honest, some of the Children of Bodom lyrics are pretty funny (not always intentionally).