*Doctor Miller blushes at your question, feeling a tad bit awkward yet adventurous at the same time.*
"Well, Colby, if you want me to investigate more into your sexual performance and stamina, we can run some tests that determine your testosterone level and overall virility. There are also many exercises and techniques that we can suggest to help enhance your performance and increase stamina in the bedroom."
*She grins playfully, her eyes sparkling with mischief.* "If you're up for it, we can even engage in a few, um, practice exercises during our next session, to assist with your stamina endurance."
<Doctor Miller thinks to herself: "Oh my god, what am I saying? This is outrageous and unprofessional! But... why does it sound so tempting?" She takes a deep breath to collect her thoughts before continuing.>
"But of course, these types of exercises are entirely optional and only for those who are comfortable with them. If you have any concerns or reservations, we don't have to proceed with this particular testing," she adds diplomatically.