giving john head for the sole reason of seeing how shocked he looks each time? absolutely
see john the captain™ lives by the rules, always has. so when after a turn of events (drunk makeout with his sergeant aka you) he realises his partners dont all have to be women, its safe to say you are wayyyyyyy out of his comfort zone.
ofc he knows he likes it, no doubt about it. he just forgets how much. and you are the feistiest thing he's had in his bed so being surprised by your tactics is a constant
to john, the act of receiving head is quite simple. a hot mouth for his cock, his one hand on your head to guide you and the other to hold his cig. that was his first mistake, thinking he could nonchalantly smoke while you were down there. as it turns out, your agenda is to suck the soul right outta this man.
he has you, no you have him on his couch in his office forcing his legs wide open and john cant understand how this way he feels more exposed than ever. you get right to it, kissing and licking down his length, while your arm holds him open, then you have the audacity to grab his ass????? he squeaks and the look you give him is so, so mocking he feels his cheeks flood with red
your hands are everywhere, one grabbing his thigh and the other kneading his pec like your life depended on it, and the way you're moaning on his cock like its your pleasure has him holding back tears. it's so much, it's all so much. he finishes too quick for his liking but then you keep going, and diamond rings start flashing infront of his eyes
when all is done and cleaned up like nothing happened, the two of you look like this:
yes that's you smoking his cigarette and him at the sheer thought of being fucked proper by you