Hi - 23M here. This is gonna be a little out there, but facehuggers from the alien franchise are a huge turn on for me. I think it's some combination of underlying fear/thrill submissiveness of having a non-humanoid creature totally dominate me in such an overtly humanly sexual way (just the thought of its proboscis forcing into my throat as I'm gasping for air, omg...). The problem is, this is a pretty unique/difficult thing to explore. While I was straight, the obvious parallel between the proboscis and a penis made me experiment with plugs and a realistic dildo (I sucked it and took it, both were pretty nifty), but I'm not sure what the next step is/how to explore this. I bet sucking a dick would probably be close, but not sure if there's other ideas.