[NSFW] How could I seduce my college professor?

I had this professor and he’s extremely hot. When he talks in class it’s like he’s about to take his belt off and slap my ass with it, pull my hair and talk dirty in my ear while he’s pounding his way in the tunnel of love. Sometimes, when he looks at me, he smiles and you know when he does that it makes me so horny… And I notice that I’m the only student he remembers in class. Just looking at him talking in front makes me wet.

I don’t want any relationship with this professor, but I want to be friends with him, and probably ask him if he wants to have sex with me or have a threesome with my boyfriend. I want to let him know that I don’t want anybody in the campus to know, and that I won’t let anybody know, too, just the three of us. I know that teacher-student relationships are frowned upon, but that’s not what I’m onto. This is something personal, and I don’t think my private life is the school’s business, I just want to explore, I want to keep everything private and our identities safe.

I’m 21 and he’s in his late 20s. I think he loves going to parties and events and socialising, because I often hear him talk such, so I guess it won’t be hard to talk to him since he’s not that old. But, how could I ask him? I could talk to him like a “friend” but I can’t ask him anything about sex? How can I politely ask him to have sex with me and my boyfriend? Any tips?

Again, this is only something personal I want to do, it’s not a big deal. Thanks!