They have mouths ... - They are shaped like people, but have none of the attributes of intelligent beings.
Related Commentaries of Psalms 115:5
Psalms 115:5-7
5 They have mouths, but they speak not: eyes have they, but they see not:
6 They have ears, but they hear not: noses have they, but they smell not:
7 They have hands, but they handle not: feet have they, but they walk not: neither speak they through their throat.