Do not pick your friend. If you are going to have a threesome hookup, choose someone that don't matter, such as a stranger on tinder threesome apps. Or a person you met when you are going on a vacation together. Why? Have you seen Gossip Girl? Dan is dating Olivia and they decide to have a threesome with their old friend Venessa. How does that turn out? They break up in the end. The same for having threesome with friends. Friendship can easily turn to romantic relationship. People can easily feel attracted to their friend in certain circumstances with the right chemistry. Threesome hookup can create the atmosphere and chemistry. It can be very hard for people to keep their emotion away if it is a friend. Therefore, do not have threesome hookup with your friends. It can not only jeopardize your friendship, it can also threaten your marriage.
Keep all romantic feelings away. For the swinger couple, both parties shouldn't have romantic feeling towards the third. Even if you listened and chose a stranger, but there is still risk, especially the third has a pretty face and nice body. Therefore, it is necessary for you to build up a strong mind before seeing the third. Get clear with your purpose. You will be only related sexually, but not emotionally.
Do not make regular meetup with the third. Sometimes, you just had an amazing threesome hookup with a person and you wish to make her a regular threesome partner, that is dangerous. Threesomes should be just like one-night stand. After one time, you will be back in your life without any connection. If you make it as a regular meetup, it can be very easy for you to generate feelings towards each other. In this way, it could put your current relationship at risk.
Build up intimacy first. When you are together, do not jump into bed too soon. Spend some quality time together. Have some drink, watch a movie or play some games. It is essential to build up intimacy first if you want a successful threesome, or it can be very awkward with a stranger in front of you. The case is the same for the third. This is also a way to show the third that she/he is very welcomed and won't be left out.
If you are very nervous before having a threesome dating, if this is your first threesome, you can calm down and have some drinks, but not too much. Alcohol can boost your confidence and brave up.