Indeed, object constructors return a reference. In general, you should just use that reference without further indirection.

my $Object = ObjectMaker->new();
Foo::DoSomething(foo, bar, $Object);
$Object->MethodName(blah);
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You only need to do Foo::DoSomething(foo, bar, \$Object); in the very uncommon case where you want DoSomething to be able to change where your reference ($Object) points to.

Updated to be add more details: for example,

DoSomething(foo, bar, \$Object);
print $Object; # prints "42"

sub DoSomething
{
   my $foo = shift;
   my $bar = shift;
   my $Object = shift;
   $$Object = 42;
}
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Now the caller will notice that his $Object is not longer an object reference but a scalar with value 42! This way of passing parameters by reference so that they can be modified is very common in C and Fortran, but not so common in Perl