People can fuse with each other now

About a month ago, people discovered that they had a new ability where they can do something similar to gem fusion from Steven Universe where you can fuse with other people to create a new improved single being (as many as you can handle).

From the Fuser’s perspective they are all inside of a room where they have to all be in agreement in order to do an action (time works differently in the fusion mind to allow this while also letting the fusion look like it’s working in real time). All participants in the fusion have to consent to it and can opt out of any time.

The fusion will have the combined strength and size of the fusers (if two 5 foot men combined, the fusion will be 10 feet and have the strength of two men). They will also gain enhanced forms of any skills/abilities any of the fusers has such as intelligence, speed, durability, etc (depends on who has the better ability)

Also people can’t stayed fused forever as it can cause issues both physical and mental. Most can only stayed fused for up to 12 hours before needing to take a prolonged break.

What would you do with this ability? How do you think this would affect the world?