Just like diapermouse I have also enjoyed diapers since around 5 years old but diapers didn't become sexual to me fully until around 10 years old as well.
But I have been masturbating in wet diapers since around 5.
When I was 5 years old a babysitter put me in a plastic backed diaper which I think was a Luvs diaper but it may have Pampers.
It's been so long now and 29 years ago but either way it was a plastic backed Luvs or Pampers diaper.
I was sitting on the floor I believe and was watching TV and started squirming and holding my pee because I was shy about asking to use the toilet in peoples places.
So eventually I wet my pants and the floor.
The babysitter noticed and she took me to the bathroom and gave me a bath and then put my pants in the washing machine.
After bathing me she laid me down on a changing mat and put some baby powder on me.
Next she pulled out a thick plastic backed diaper and slid it under my butt and pulled it between my legs and taped it on.
At first I was mad but eventually I started loving the feeling of it.
I peed in it a few times and then my sister came and picked me up.
The babysitter left me in just my diaper, shirt and socks and shoes.
So when my sister picked me up I was wearing the diaper without any pants.
My sister walked me home down about a block away and I was 5 years old walking down the street in my nice thick comfortable and wet plastic backed diaper without any pants and just a shirt socks and shoes.
It felt so nice but sadly my sister took it off of me when we got home and threw it in the trash.
But when she was not looking I snuck the diaper back out of the trash and put it back on.
I was so happy being in that thick diaper and have loved diapers ever since.