Watch Bo Sinn: Hard at Work for Free: How to Stream the Movie Online at 123Movies. . Bromo presents Bo Sinn: Hard at Work starring Bo Sinn, Skyy Knox, Benjamin Blue, and Thyle Knoxx. Hard Mechanic: Sky Knoxx takes his car in to the garage, but when he arrives he finds Bo Sinn jacking off with a stroker, and he wants to get his hands on the mechanic's hard tool. Bo spots Sky checking out his bulge and even sniffing and licking his toy, so he gets out his cock while asking the bottom to pass him a wrench. Roadside Cuckold: Benjamin Blue and his bf are stranded by the side of the road when their car breaks down. Luckily, another car comes along and they flag it down. Pyromaniac: When Thyle Knoxx ignores Bo Sinn to flirt with a fireman washing his truck, Bo knows there's only one solution: tie up the firefighter and steal his uniform.