Where's that confounded bridge??

[matthoggard]

Had to use a Line form zeppelin song for this thread title but it is very relevant.This is for you theorists. Im writing a bridge to a song. DMaj scale for the root and chords.I know that according to "formula" most bridges in popular music are a perfect 4th to the root.Why the hell cant I use a b3rd. Its just the minor parrallel to the major 4th of DMaj.Sounds good on a piano. Works well on guitar. BUT from a chord progression that is in a major key. I dont mind going to a minor chord progression for the bridge. It actually would fit what Im trying to say in the song. Im sure you real composers out there might have some opinions.Chorus progression is CMaj, GMaj, DMaj. trying to use Fmaj, Gmin,BflatMinor then end up on a Dmaj for the verse to start again.Did I make any sense?? IF not Ill try to clarify.