The apostle calls the kiss holy. When the kingdom is worthily tested, we express the affection of the soul with a chaste and closed mouth. So again, he doesn't say anything specifically there about people of the opposite sex. He just talks about kissing with a chaste and closed mouth. So again, the implication is that men and women were exchanging kisses between each other, not necessarily again on the lips. I could be on the cheek, and he's saying it should be with a closed mouth.
Join us in earnestly contending for the faith that was once for all delivered to the saints.