Tiling my bathroom just a "silly" question regarding cut tiles.

The main wall I've done with full tiles has a gap around the three
edges that needs filling in.
Do you cut strips off full tiles as in will the edges be ok when they
are in and grouted?
Obviously some would have no machined edge on them being from the
middle of a tile. I have an electric tile cutter from Screwfix I used
to help my dad do his kitchen floor but there were loads of off cuts
with that job to use at the edges.

Sounds stupid just typing it but there you go... :-)

Mark S.

PS. picture at http://uk.f2.pg.photos.yahoo.com/ph/marknicesenior
if it works...