I gave my brother a rectal exam:

We were at my Aunt’s farm one summer and she called me aside while the guy’s were stripping and lining up for their rectals. She knew I had learned a lot about butts and I had developed into quite a young lady with some very big fingers, so she had me help with the exams that morning. I started with my brother (he was used to it from me by then) and gave him a thorough examination. He told me later it felt like I was inside his dick poking around, maybe I was I dig deep. I had them line up to take it, some cried and they got the paddle from my Aunt, some got broke in good and sort of liked it. Some of them backed into my huge fingers.