Well the ubiquity of porn on the internet has an effect on people's fetishes where they can get addicted to it and go down a long and winding rabbit hole, turning to increasingly more extreme representations of sex as the previous ones become dull through repetition, and it seems like there is no limit to the extremes the mind can go to as more and more people fetishize incredibly unhealthy, dangerous, and even deadly practices. All told this is a pretty minor phenomenon and you shouldn't look down on people for being into inflation no matter how strange you think it is - but as an aside never ever attempt to "inflate" part of yourself because the human body is not designed to hold pressurized air and you will cause major, possibly permanent damage.