A 25-year-old male presented to the clinic because he was recently exposed to one of his partners who has been diagnosed with lymphogranuloma venereum. He reports a history of ulcer on his penis and tender inguinal lymphadenopathy. As you prepared to examine him, you thought about the characteristics of ulcers observed in lymphogranuloma venereum. Which of the following correctly describes the characteristics of the ulcers observed in lymphogranuloma venereum?