What do you use to sharpen your knives?

[SatNavSaysStraightOn]

What are you talking about? Review the person's OP. You and they are not making any sense.

I was filling in the missing information for you, that you had failed to pick up on. There is no need to be rude.

You wanted to know what was disposable. It was just not stated clearly enough for you to pick up on, so I filled it in for you.

Please read it again and if you can't reply politely please don't reply.

They're razor sharp. I used to sharpen razor blades those too but (the) disposable (razor blades) got cheaper...

 

[Barriehie]

I read it exactly like SatNavSaysStraightOn

Correct.