Riddle 64

My first is good when it ’s alone;
The best ones are our mothers’;
And though we have it of our own,
We ’re apt to take another’s.

In many devious paths we stray
When by my first we ’re beckoned;
And by my first we ’re dragged away,
Or else we are my second.

Sometimes my second may be shot,
Which brings much grief and dole;
But when my second’s very hot
It cannot be my whole.