I am a disabled man in a weelchair,I can't use my legs or feel below my waist and,since my childhood, I always loved to be tickled by females(my mother,school girlfriends,nurses or paramedics,etc) in my ribs,my armpits,my tummy,my neck or even the palms of my hands..I never thougt it was weird to tickle me even if I couldn't defend myself and I sometimes cried of lauging,because I had complicity with my ticklers.I have a lot of good mémories as a ticklee,even with my handicap.I wrote about some of them but especially in french,my maternal language.
When I was in university ,I lived in a medical hostel for disabled students and certain female nurses or paramedics knew when a person they had in charge was tickish and they sometimes took advantage of it playfully ,even with heavily disabeld persons.The hostel was small with family atmosphere and they knew how far they could go with us,so nobody considered that weird and I think a lot of us loved to be tickled by young beautiful women. .One paramedic had once tried to tickle my soles when she helped me to wash myself and she said she loved to do that to ticklish people ,but I am not ticklish here,so she was very disapointed,lol.I also saw one of my friends who was in a welchair tickled in the ribs by his "unabled" girlfriend .He could hardly move and she tickled him very hard but he seemed to love it
I understand why certain persons considered weird to tickle handicaped persons.But I think the problem is more general:they don't know how to behave with us,maybe they are afraid to harm us.It is not a critiscism,but a constatation.