We mutually decided to enjoy the company of...

Well we have had a couple close encounters with another couple, but they are not 100% ready. We however are in a wonderfull monogamous relationship and are 100% comfortable with our sexuality. We are ready to explore the company of a bi sexual female or a straight male couple. Any pointers or interest in helping us find a safe and enjoyable experience would be greatly appreciated. We really are excited with the prospect that we will find someone but do not want to get in a unhealthy or dangerous situation.
Thanks for any input
Lisa.