well if you are getting these deep seated feelings from this act, inhale to assume there have been other instances that leave you doubting. if this is the case, then sitting him down and clarifying you just want to have a calm.and honest conversation about your concerns regarding his satisfaction (only worded this way to out him at ease, feel.free to bring up your needs once he has opened up) will get you the answers you seek. That being said if you think he is carrying the wait of masculine expectations than be sure to approach this from a position of what you can do not what he isnt loving up to. again your needs must be addressed but you have to ease him into open and honest communication (once he is comfortable these conversations will become easier and less egg shell walking) good luck friend.