There's a lot to be said about "edging". As long as the attention is on the porn and the act of self-pleasuring, it seems that the pleasure in the act is infinitely more than the orgasm itself.
Even with hookups, one has found that the way to continue the pleasurable experience of sex, is to hold off the orgasm as long as possible. The side-effect is that there's a lot of precum leading to very, very stained underwear ?