However the area is still a very small grouping of the pornographic DVD market . For example at porn seller HotMovies.com , there are only 655 bisexual movies out of a showing of more than 90,000 films . However the genre remains a very small proportion of the pornographic DVD market ; for example at porn retailer HotMovies.com , there are only 655 bisexual titles out of a catalogue of more than 90,000 films .