Demisexual people have a very specific way of experiencing sexual attraction. Demisexuality is basically when you don’t feel sexual attraction to other people unless some sort of strong bond or emotional connection has been made.
With the prefix “demi” meaning “half”, you could think of it as halfway onto the asexual spectrum. They are often known as “gray ace”.
This relates to autism in a variety of ways – sensory/touch, relating to other people and building meaningful relationships, and understanding others intentions.