My worst shag was many years ago when I was around 21.
At the time I was living on the sunny coast and surfed every minute I could.
One evening I had been drinking and went to the local with a few mates. After a couple of hours this hottie walked in with a short black mini on, tight singlet no bra and the highest high heels I have ever seen. I commented to my mates as she walked past a little to loud and she heard me say "I would pound that ass if I had the chance".
Well after few more beers we decided to call it a night, I decide to get up and get a cab. As I walked out the door I felt someone slap my ass very hard, I turned to see the hottie standing behind me laughing.
She asked "how did I like that?" My reply was to grab her and kiss her passionately. Well one thing lead to another and we were in the cab on our way to her place.
We ran to her room ripping our clothes off and getting on the bed, I bent her over and slapped her ass hard as I entered doggy.
Well I had thought I went to heaven, this was a smoking hot chick and I was fucking her doggy hard. At first she was wild thrusting back hard against me then all of a sudden she went very still and asked me to slow down and not make her jerk around as much.
At this stage I thought what the, so I looked down to see she had a needle in her hand getting ready to jam it in her arm.
Well lets say I couldn't pull out and dressed quick enough. I ran and ran thinking what the fuck did I just do.
I finally found my way home and the next day straight to the doc.
He laughed at me when I told him the story and I had all these tests done over a scary few weeks. Luckily for me they all came back all clear.