Old thread, but I wanted to weigh in.
I'm in an LTR at the moment that I've been given the blessing to explore sexually as long as she doesn't find out, and as long as she still gets her daily dick at home. We have great sex, and I'm lucky to have found someone willing to explore a lot of kinks and fetishes. A big part of it is to be open and comfortable to your girl with what you enjoy. If it doesn't work for her, or isn't curious herself, she can move on. On the plus side, being sexually open yourself makes her feel that she won't be judged or slut-labeled if she wants to do some exploring herself.
Granted an LTR has much more variables than just "great sex". Similar interests, philosophies on life, and most importantly having eachothers back. Otherwise, you're just shacking up with a fuck buddy, imo.
While sex is great at home for me, I honestly do like spending time with other women, and P4P is a great way to see other women without the extra drama. I always love the pre-game jitters I get when I'm about to open the door to see the women I'll be spending time with for the next hour or so. I've also been reading a bit about the Coolidge Effect in males, as it does seem that my sex drive is pretty high in general when I'm seeing multiple women.
@Mischa Maxwell had a great post about this in another thread, and theorized that the perfect number of women for men to see at a time is three. I'm starting to believe this theory myself. I'd say an arrangement like this is ideal for myself: LTR, two regular P4P providers, and the monthly one off with a new provider (or that random 3P with girls in maid costumes
).