It is very normal for an 18 year old to sleep with a stuffed animal.
Stuffed animals are great for anyone of any age to sleep with or cuddle with and enjoy.
Whether you're 0 or 100 or older there's nothing wrong with having stuffed animals and sleeping with them at any age.
I'll be 38 in March of 2026 and I'm a male and sleep with a Winnie the Pooh large stuffed animal as well as a stuffed dog I had since I was 10 and I still have and sleep with my little stuffed toy duck that my dad bought at Walmart in April of 1988.
I could never give up my plush toys and certainly could never give up my little plush white toy duck.
He's such a cutie and adorable toy and has provided me with lots of comfort from when I was a toddler and through my childhood.
I still talk to my plush toy duck today and will never get tired of him.
He helps comfort me even now.
To me my plush toys are not just toys and to me I think of them as real friends.
Plush toys and stuffed animals are for anyone of any age and there's no need to give them up or stop sleeping with them, just because you're grown into an adult.