Running a PL/pgSQL function

I'm startled that I've never done this before, but...  I have a PL/
pgSQL function that takes no arguments, returns VOID, and has a bunch
of side effects on the database.  The correct way of invoking this
function is:

    SELECT my_func();

... yes?  Thanks; it seems to work fine, but using SELECT here is
causing some part of my brain to scream "counter-intuitive."