The Prophet (SAW) , said: “No person should be alone with a woman except with a Mahram.” [Muslim]
They are more likely to be tempted into impermissible looking and touching with the possibility that they might arrange a date with each other and other such evils. Undeniably, the devil circulates like blood in the human being; therefore, it is completely forbidden for a Muslim man to be alone with a non-Mahram woman.
Moreover, when a man is with a woman alone in private, the devil uses the situation to lure them into committing sins. The Prophet , said: “Never is a man alone with a woman except that the devil is their third [party]. “ [Ahmad]
Allah Knows best.