We knew each other for almost a month. We met through a common friend and after two dates we became lovers. I was a Computer Science student, first year, and I still didn't know much about her. In the day of our second date, we took advantage that her parents were away and went to her place. We were setting on her bed, enjoying a bottle of wine and making out when I noticed the doctor smock that was hanging on her wardrobe. I asked her about it and it turns out she was a nursing student and her university required every student to wear a smock. Since we were already a little warmed up from the alcohol, she started to tell me that she had always wanted to become a nurse for the domineering feeling the job implied. It was a little stunned, I had always thought that she was the submissive type. But didn't mind that. I always liked role reversal in play. She started telling me more and more about her fetishes and what she thinks doing to some patients, both male and female, during practice hours. Suddenly, her chestnut colored eyes went down and her face turned red. I realized she felt ashamed - we had never fucked at that point and yet she was telling me about her kinky fantasies.

To flip the mood, I started talking about mine. I told her that when I was 13 years old I got sick and I had to go to the doctor. He prescribed me a penicillin shot. I was quite afraid, never had one before and I had heard it used to hurt a lot. But the nurse was beautiful and the thought of letting her in control was exciting me. I remembered she was looking at me with a smirk.

'Now, be a good boy.'

I stood down and removed my pants as ordered. I left my boxers there since she didn't mention anything about them.I wanted to be pampered by her. My erection was rock solid. When the injection was ready, she came next to me and smiled.'Those go down too, darling'. She grabbed my boxers and brought them to my knees and my hard dick was revealed, to my embarrassment. She didn't say anything and I felt the smell of alcohol followed by a felling of coldness on my left cheek. That suddenly, she spanked my bottom and jabbed the needle quickly. It didn't hurt at all and I was disappointed. But that feeling dispersed soon after, when my cheek started burning. Although she injected it slowly, it started to burn more and more. I wanted to cry but I didn't want to add to my embarrassment so I managed to hold my tears. The injection was done, the needle removed and she slowly massaged my ass. My dick was getting harder and harder. She turned around, I've got undressed and that was it. I've never required an injection since that day, but I've always wanted to be injected in a similar fashion by a beautiful girl.

My girlfriend started smirking after hearing my story. Her shame was gone totally.

'I'll note that down 'she said . We started kissing again. Her clothes slowly came off and her body revealed to me. I put her down on my lap and told her she has to receive her punishment for having 'indecent thoughts' without my approval.

'40 good ones' I said

'40???!' she replied why an astonished face but still smiling.

'Don't make me double them!!'

I started spanking her ass. WHACK. WHACK. At first I gave her a good twenty ones quick and fast. I saw she was enjoying it. Then I started to caress her ass, not allowing her to anticipate the moment when my palm will hit her bottom. I think I did give her around 60-70. I never count, it spoils the fun. I got rid of my clothes soon after and put her on her belly. I fucked her good, spanking her ass between moans. I wanted to show her who is the daddy. After that we were still naked. She smiled and told me to my ear:

'Next time I'm going to make you a good boy' and kissed my cheek.

I smirked.

'I'm looking forward to that' I said.

Winter came and with that winter holiday. I had the bad habit of catching a cold at the beginning of every winter. This time was no different. I was home sick, my parents were away. I was playing games all day when I heard the phone ringing. It was her.

'What are you doing later this evening' she asked.

'Nothing. I'm sick, my parents are away and I just want to stay and watch some Christmas movies.'

'Ohh... how about I come over then. Christmas movies are no good to watch alone'

'With you, I'll be watching another kind of movies'

'Ha, you bet'

I feel fresh. Strange how I was dying a moment ago and one phone call did magics. I waited for her for one hour. The door rang and she came in. She had a backpack witch was strange - she always took a handbag with her. 'What's that?' I asked. 'You'll see', she teased me. 'Where is the bathroom?'

I showed her the bathroom and returned to my room. After 10 minutes, she came back. She was wearing a full nurse uniform, with black stockings.

'It's time for your treatment' she said and put down on my bed three sets of hypodermic needles and syringes followed by some vials..