Why not Secret-Keep each other?

[fawkes970]

No: HPFGUIDX 80062

just a thought i'd like to throw out there: why wouldnt Sirius and 
James be each others secret keepers, this way Voldemort could not go 
after the other no matter what he did: as long as they did not let 
out their "secrets". Some body tell me cause it would help to put me 
at some sort of ease...or at least respond so i know im not just 
being dumb. ~Fawkes(pat)