Satisfying my girlfriend's cravings for doggy style

I have a girlfriend, and she's got a thing for dog style. She loves it more than anything else. So, whenever we have some alone time, that's the first position she goes for. But here's the thing, I'm not just satisfied with one girlfriend. I've got another one too, and she's got a thing for blowjobs. So, I've come up with a plan. I bring my other girlfriend over, and while my main girl is bent over waiting, my other girl is giving me a blowjob. It's a win-win situation. My main girl gets her favorite position, and my other girl gets to watch. And let me tell you, watching her watch is one of the hottest things ever. It's like a group thing, but no one else is involved. It's just us, and it's perfect.