In the aftermath of my first and only romantic relationship, I can't even think about cuddling or kissing someone on the lips without thinking about the way my ex-boyfriend treated me. He did not hurt me, but he didn't seem to understand that because I am autistic, I can't stand French kisses or kisses on the neck. Even when we broke up the first time (we were still friends at that point), he still wanted to cuddle with me. At the time, I just went along with it, because I didn't want him to be upset. Looking back to when we first met, I think he took advantage of my naivety, because I told him that I had never been in a relationship before then. Every time we kissed, he was a bit too passionate about kissing me, so it was always a mini sensory overload for me. Of course, I didn't think to tell him that I didn't like it, but I am glad that I ended the relationship when I did. I even told him that we couldn't be friends because I felt that uncomfortable around him.
But I still like hugs from my friends and family. Other than that, I don't like being touched.
EDIT: I've recently discovered that I love platonic cuddles, but it depends on who I am with.