Sydney commuters were left shocked after they witnessed a couple engage in a what appears to be a sexual act on a train.
One Facebook user claimed she saw the pair become overwhelmingly frisky on the western Sydney train.
The man allegedly had his pants down while sitting on the seat on Wednesday night.
A Sydney couple were caught out engaging in a sexual act on a train on Wednesday night
The woman posted the image of the amorous couple engaging in the act to Facebook.
She detailed her confrontation with the lust-filled couple and asked them to 'get some respect' on the Facebook post.
The disgusted commuter said she got on to the train and sat facing the couple while travelling to a friend's house.