My(18F) autistic younger brother (14M) won't stop saying sexual things to me and pretending it's a joke. It's been several years that he constantly tries to walk in on me getting dressed and just generally wanting more than a brother-sister relationship. At this point it's not even funny and I don't really know what else I can do besides just going "hey please don't do that" because he doesn't listen and my parents don't care. Wtf do I do? He won't talk to girls so he's not going to stop because of a girlfriend or anything.