Sucking on a bottle

He curses. But then he remembers a video he once saw. A girl was deep throating a bottle in it. He thought it was hot. Maybe... He could give it a try? After a moment of consideration he shrugs. "Why not?"
He looks around. No one in sight. So slowly he raises the bottle to his lips. He licks it, as if testing it. Then he pushes the bottle into his mouth. After a moment he pulls it back.
"Ok. That's weird but makes me horny!" Walter thinks.
He starts sucking the bottle. After a moment he speeds up. He moans and he's surprised by it. He's even more surprised to find he's getting wet down there. And it's not sweat. He continues sucking the bottle. Little by little the bottle goes deeper and deeper. Soon almost the whole bottle is inside Walter's throat.
"Holy... where did Monica learn to do that?" Walter thinks, impressed.