People think my dad's a creep

My friend's think my dad is a creep because of how close our relationship is. My dad was a single dad. My mom left when I was a baby and I never saw her again. He was also a nurse and has been a nurse for 28 years. So he gave me my first period talk. And he was always there if I had questions about my vagina. They think it's weird that he answered questions I had about my vagina but wouldn't he do the same for a patient? So why is it weird he does it for his daughter? When I first started growing hair on my vagina I was confused and went and showed my dad and asked what the hell. He of course told me to pull me pants back up and had the puberty talk with me. When I had a rash on my pube area I showed him what was going on and we went to urgent care. I never thought what was going on was weird or creepy. I just had questions and he answered them for me. My dad has never been inappropriate with me. He just gave me answers to my questions and if he felt I needed to go to urgent care he took me. I didn't have a mom to form this type of bond with. Just my daddy.