Is it normal erotic asphyxiation

So of all my friends Im close to I'm the only wierdo who's fantasy involves choking etc etc. Problem is when I finally convinced my husband to play along I loved it and he wigged out when he saw little red (I'm assuming ) blood spots on my neck and face. Of coarse now that he's like hell no that's dangerous I don't wanna kill you.... I REALLY want him to. Have I lost my mind or is there a semi-safe way to play out my fantasy? Any advice would be great because who the hell woulda thunk it but I couldn't really find sh** using google search