a intellectual person in a casual shirt explaining a topic in great detail. expounding on a lesson. using hand gestures while

30s adult american articulate backdrop background beard biracial casual clarify communication concep concept conversation dadbod debate detail discuss elaborate eloquent elucidate explain explaining expound expounding express expression eyeglasses facial factual filipino fluent gestures glasses gray great guy hair hand intellectual intelligent isolated knowledgeable late lecture leisurely lesson loquacious male man mestizo oral orator person persuade plain public rhetoric shirt silver skills smart speaker speaking standing talking teacher thirties tongue topic verbal