Lascivious and Porno

Lascivious adjective - Depicting or referring to sexual matters in a way that is unacceptable in polite society.

Porno and lascivious are semantically related In some cases you can use "Porno" instead an adjective "Lascivious".

Porno noun - Creative activity (writing or pictures or films etc.) of no literary or artistic value other than to stimulate sexual desire.

Lascivious and porno are semantically related in indecent topic. Sometimes you can use "Lascivious" instead an adjective "Porno", if it concerns topics such as obscene, pornographic.