Answer:
I am not a toy though many use me for pleasure. I have a butt but I cannot poo.
Lovely and round, I shine with pale light, Grown in the darkness, a ladyβs delight.
I am a protector of the scoreboard.
I can be swallowed But I can also swallow you.
I go around in circles, but always straight ahead, never complain, no matter where I am led.
What age most travelers have?