Quote Originally Posted by Antenna60 View Post
Interesting that you say that because I've thought the same thing. The blades on disposable razors are very thin and flexible. Conseqently, if they start out sharper, in my experience, they don't stay that way for long. I got two, maybe three, good shaves out of one before I should have tossed it. That and poor shaving technique (one ATG pass, then touch up work) gave me years of razor burn.
Yeah, they aren't meant to last. I assumed you were using a the disposable on your dad for hygiene reasons and that it was, thus, new. But straight out of the box they should be as sharp as a newly honed razor.