A Secret I Never Talked About

For years now, my marriage has been stable and fulfilling on all fronts, but there's a secret I've never shared with anyone until now. During our weekly sessions in the room above the garage, where we indulge our kinks, one of them involves an unusual object that isn't exactly meant for human use. As part of our roleplay, my husband ties me up and slides a well-lubed kitchen funnel into my mouth, filling it with cool water before sealing it shut with tape. The pressure against the back of my throat is intense, yet I find myself aroused by this sensation as he fucks me hard from behind. He pulls out just before coming to remove the funnel and relieve the pressure, but then slides back in to cum deep inside me. It's an exhilarating blend of danger and desire that we both crave during these sessions. How common is this kind of setup or do we stand alone with our unusual tastes?