Obviously because you dont need to....but why? Some might say because they're disposable and you throw away after 10 shaves (or so..) but then why not strop your straight after every 10 shaves (or so..). If its due to the type of steel used, then why not make straights out of this material?

.....just curious why its unnecessary..

....or maybe some of you do strop your shavettes!!?