Yes, reluctantly

In the end, you let Shizune perform the battery of tests on you, including that test. It's a good thing that you have gone through interrogation training and Jiraiya has taught you how mentally withdraw yourself from the real world in case you're captured and being tortured for information. While she perform the tests, you imagine yourself being surrounded by endless ramens of all types, tantalizing you with their aromas. People would expect you to imagine eating them but doing so would cause you to break out of the mental withdrawal sooner than you're supposed to.

"Done," Shizune says, breaking you out of your stupor.

Reaching to pull up your pants, her next words stop you.

"Wait. There's a last test."

"Another one more?" you groan. "What is it?"

"STD."

"I've never have sex, so how can I have STD?" you protest.

Shizune's eyes widen. "You're a... virgin?"

"Why is that a negative thing? Despite how I look, I am a responsible person, you know."

"No. I'm not implying that you're irresponsible. It's just that, you've been with Jiraiya for so long, that, you know," Shizune gestures with her hand, hinting what was implied.

"He's a super pervert and part time asshole but there's some line even he wouldn't cross. He did tell me that he's afraid that my mom will come back from the grave to kill him if he brings me to red light district before I'm 18 or ever, so he's not that altruistic of a person, but still..."

"I guess I owe you an apology for that," Shizune replies as she removed the glove from her hand and go to the nearby wash basin to wash up. She then rubbed dry her hands. "Now, let's focus on the test."

"But."

"No butt. We have gone through it just now and I don't want to hear you chanting 'ramen' non stop. Strip."

Reluctantly, you pull down you trouser.

Shizune perform a quick diagnostic jutsu and her hand begin to glow. As she put her hand around your naked pelvis area, Shizune explains in a clinical voice that STD, while mostly transmitted sexually, can be transmitted through with damp or moist objects such as towels, wet clothing, or toilet seats or through contact with surfaces infested with the viruses or bacteria. Hence, all shinobi that returns from mission has to be examined.