Being a couple to participate in a
threesome, you two have to reach an agreement in advance, otherwise, you will make everything messy. If you both you and your other half are curious about
threesomes, you can just skip this step but if one of you has no interest in this, the agreement between you two can be said to be the most important part for a nice threesome experience. It is possible you will share your significant part with the third person you invite and watch them making love in front of you, can you make sure you will not feel uncomfortable with this?