Maybe the strike team actually find the asset very endearing and have great affection for him. After working with him and using him for so long, and spending time with him on missions, he's like their beloved family pet.

After a mission he will sit at their feet perhaps while they throw him snacks, or lie with his head in their laps while their stroke his hair and call him a good boy. Maybe if he's done a particularly good job (or they're just in the mood) they will unzip his fly and gently and lovingly jerk him off while he rests in their arms or on their laps and make him lick his semen off their hands afterwards. Maybe this helps him relax after a mission.

If he's been a particularly good boy they might hold him close and put their cocks in his ass, grinding gently, always making sure he orgasms more than once. The asset loves this more than anything, and when he sees them unzipping their trousers he gets excited like a dog who sees his owner take out the leash. Bonus if they actually genuinely care about him in a fucked up kinda way.