Would it be odd for two main characters in a story to get amnesia but not at the same time or in the same way?

If not would it be odd if the two meet up while suffering from this condition?

Any suggestions of how to stimulate their memories if neither know this is necessary? sad

TLAT

~ It was because she'd been speechless. Her. Lois Lane.
Supreme Babbler. Had been speechless. ~
Reluctantly Engaged)