Oh wow, many comments are disastrous here… Don’t listen to anyone telling you that committed relationship can only be monogamous! I was in your shoes when I was in my early 20’s too. We had a couple of threesomes, it was great, but we didn’t fully open the relationship. It was only threesomes for us, so I could have sex with both genders. And well, it was fun for my husband too. We had a great relationship and loved escorted dearly. Now life isn’t easy and I’m single now. So i can talk for experience of being the third girl. You know, I really prefer couples, because feelings are off the table. I’ve been with many couples over the past 1,5 years and all of them are still happy together. Threesomes are fun. Period. Enjoy yourselves and set boundaries beforehand to ensure a nice evening. Just communicate openly and be honest to the third party. Make sure everyone knows it’s okay to call it quits at any given point. I think you’ll be fine