Hi guys. Well, I think you will have already guessed that there are at least one or two other couples who are hoping to tempt a young, sexy single girl into their bedrooms so the best thing to do is play up your advantages.
I get that you want to make it clear that you're offering a no-strings arrangement but I think it can be conveyed in a less abrasive way. A lot of girls do enjoy hooking up with couples without any emotional attachment but they do want to know that they will be treated with respect. No one wants to feel like an object or toy that is going to get cast aside once you've all had your fun.
You don't need to sound like you want to be best friends but perhaps a profile that hints at having a good time socially as well as sexually is going to make single girls feel a little more valued. After all, if you seriously just want a woman to come and service you both sexually, then there are places where you can rent just such women.
Make sure you have friendly photos of both partners and perhaps include a scenario of what you'd like to do with a girl. Suggestions of delicious champagne, spa and other things that girls like will also help sweeten the deal.