As mentioned, be careful with the teeth. I was so eager to suck that I wrapped my lips around cocks without using them to cover my teeth. It might be awkward at first, but after a while you automatically curve your lips inward to cover your teeth. The bull gets good sensations without getting mauled by the teeth, and you will still enjoy the taste and feel of his cock on your lips, tongue and throat.
Don't just suck and pump. Lick up and down the shaft, kiss it like you would kiss your wife. Take it fully down your throat, although it will take a few times to tame the gag reflex. After deep throating, his shaft will be coated with your slick saliva, making it a good time to stroke him with your hand while you lick and kiss his balls. Your hands will be just as much of his pleasure as your mouth. Use your hands to touch his legs, butt, torso and nipples while you suck and lick his cock. I often end with a combination of lightly stroking his shaft while bobbing my lips and mouth up and down/on and off on his cock. This ends with generous amounts of his load in my mouth and smeared on my face.
He might want to just hold your head and face fuck you. That is just as good. I like it.
I love sucking cock. Having a woman present (my wife, his wife or a stranger) raises my enjoyment to another level. You and your wife will thoroughly enjoy this.
