Perfectly Competitive

In every perfectly competitive market
MR will always come down to MC
and yet my profit maximisation
only and only happens in your proximity.
My mood lingers and loiters like 
the values of elasticity along the demand graph
but with you by my side the opportunity cost
of almost everything else just reduces by half
externalities come and go
pushing the graph left, right, up and down
and yet your supply always meets my demand
in our small, solitary little town.
All I wish, all I wish
is for the profit maximisation to be
for the unique points wherein MR=MC
only only belongs to your galaxy.