How to make a matress flat?

[Rt-Rust1]

I think my matress is sinking on the middle so if I lay on my back my butt sinks which I think may lead to anterior pelvic tilt. So, I put whatever such as a blanket beneath my but and blank to even out the surface.
Any method you know to make the matress flat?
I was thinking about getting a table that fit the bed size and put it over the matress (so it will/d be a completely flat surface).

 

[Korea]

Nah, you can't change a sunken matress.

Just ball up ur blanket or something to fill the hollow.

 

[Deleted member 11388]

I think my matress is sinking on the middle so if I lay on my back my butt sinks which I think may lead to anterior pelvic tilt. So, I put whatever such as a blanket beneath my but and blank to even out the surface.
Any method you know to make the matress flat?
I was thinking about getting a table that fit the bed size and put it over the matress (so it will/d be a completely flat surface).

i had the same problem and i was pissed off so much.
I got the thingy that you put on top of the mattress and i put wooden shit inbetween matress and that thingy and now its rock hard(like my cock )