My partner (m40) and I (f41) have been in a monogamous relationship for 24 years. Last year we had our first threesome and since then we have been discussing opening our relationship. I am bisexual and interested in casual hookups with women and he’s straight and interested in casual hookups with women. We have an amazing relationship and amazing sex. We communicate well but I am still worried that we won’t be able to have separate, casual encounters without developing feelings or hurting our relationship. Is this valid? Am I worried for nothing? We both see sex as just a physical act and want to experiment with others. We both get turned on by the idea of the other having sex outside our relationship. Any tips from people who have done this? Any red flags to watch out for?