The devoted cleaner
Orion took his time, realizing that he had no reason to rush. With his injury limiting his mobility, he knew his performance when taking Ursa's virginity would be affected, and that was not something he wanted, especially since it would be her first time.
He believed that every action and effort he invested in pleasing her would benefit him in the future, as he had experienced the irresistible appeal of his skills on women in this world. And using those skills on a virgin like Ursa would make the experience even more irresistible.
Therefore, in order to gain insight into what would work best, Orion decided to test his performance with Aunt Greta. Knowing that she was the best healer in the village, he had the assurance that she could heal him if things didn't go as planned.