I've been asked once, "hey harno how 2 mara whore". The significance of the question didn't strike me at first, but then I realized something. These days, it's very difficult to mara whore, and the practice definitely takes some skill. Not everyone can mara whore, to be honest. If you think you're someone capable of doing it, read on.
I'm assuming you've already got a mara. I hope you do. Finding a wild mara is next to impossible, so make sure you pick a proper breeder and not some third rate mara mill. Don't forget to inspect the facilities before purchasing a mara. The eggs should not be oozing acid blood, and a team of grangers should be gurgling and crawling around the ceiling. If the grangers don't crawl on the walls and ceiling, it's likely just a stage 1 facility. You won't get the best maras this way.
When you have your mara, put some makeup on it. Don't be too gaudy. Some eyeliner and lipstick will do. Here is an example of a properly decorated mara:

The next steps are not appropriate for a family-friendly forum, and they will thus be omitted. No, there is nothing obscene about mara whoring. Only a sick person would think this. It's just too gory describing how well your mara is going to bite off entire human heads with one chomp. The makeup is only there to ensure that your mara has a positive self image. Don't remind them of their enormous underbite. That's cruel.
Good luck mara whoring.