As most people know, porn photos are airbrushed and porn videos are all about the lighting and provide a santised version of what occurs.
There's nothing wrong with polyamory, and it's a hell of a lot better than having an extramarital relationship your partner knows nothing about. The one thing I would caution anybody having a threesome of is, unless you know the person's sexual history, always use condoms as, in the case of a woman having sex with two men, determining who's the father in the event of pregnancy could be the least of your worries, HIV, chlamydia, syphilis and a few other nasties can be far worse.