I had a girlfriend when I was at university like 8 years ago. She was in sport academy and were playing basketball since she was 9. We had the same height 175cm. That times I was around 73kg and she was 57. She had of course much more athletic body than me with almost no fat
I never told her lift carry is a fetish for me but I think she got it because she was seeing how I love when she carries me. My favourite was piggyback rides, she was also carrying me in cradle carry. She was really carrying me on piggyback at least once a day with her amazing body. Some days even 3-4 times a day. It was just a habit for us I was not even asking just was jumping on her back. It was like a dream
Now I have another girlfriend who also gave me several times piggyback rides, but unfortunately not everyday. I still miss that old times....