You can't get more
You can't get more in this NSA relationship than in any other serious dating relationship. If you are eager to get more emotional attachment from your partner, you will find that you will never get it. When your birthday comes, you may not receive his gift. Even if he did buy you a gift, it must not be romantic. You will never get the roses your affair dating partner gives you, and you will never get his comfort when you are sad. At this time, you may be disappointed, or you may no longer have any expectations for this casual relationship. It's a very equal relationship, and if you're looking forward to a change in the NSA relationship, you should ask for his consent.
You may lose your common friends
The inevitable result of each FWB relationship is the end and rupture. No matter how good and healthy the casual relationship is, these NSA relationships have a shelf life. The fundamental reason is that the freshness of sex has a shelf life. Since you were friends before you joined the relationship, there is no doubt that you have some common friends. When the relationship is still complete, you can play together, which is a very happy thing. However, once the relationship is over, your common friendship is over. Imagine that your common friend would invite you two to the same party at the same time? Of course not, because it's a very embarrassing thing.
Pressure you are under is large
Although it's an uncommitted, casual relationship, the pressure on the adult affair finders in this relationship is much greater than in other dating relationships. Since you don't have the right to ask for any change, you can't fully confirm that your partner will feel comfortable in this relationship. Without enough communication, you may be bothered by suspicion. In addition, you all know that in the long run, this FWB relationship has no result. All you can get is short-term sex. So, you will bear a lot of psychological pressure.