John hesitates, his better judgment warning him not to do anything of the sort—if he were afraid just talking about magic would scare this bloke away, opening what looks like a portal to Hell ought to send him shrieking away into the night if he's skittish at all.

But then, when does John ever listen to his better judgment? Also, he loves to show off.

He takes a quick look around, and then placing his hand on Bob's shoulder, nudges him towards a dark alleyway. "Right then, in here, yeah? It's a bit... dramatic." To say the least.

Once in the alley, he takes a few steps away from the other man and takes a deep breath, muttering words in an ancient language while making decisive gestures with his hands, which leave fiery trails behind then as he draws figures and shapes in the air. He finishes the spell with a commanding flourish, and a fiery swirling vortex appears, growing in size until it's large enough for a man (or two men) to walk into. Ignoring it for the moment, John turns his attention back to Bob, leaning forward to kiss him heatedly while his hand cups him between the legs. Pulling back, John winks at him and steps into the portal, giving him a 'come hither' look over his shoulder, which Bob can choose to follow or not.