Surprising someone is not straight-forward! You have to go behind their back to do sneaky things… It might be talking to their friends without them knowing or their family.
You might even need to sneak into their household to do something.
It could also be as easy as getting them a surprise anniversary present. Whatever it may be it is sneaky. I tried to surprise my neighbor by having an Heating and A/C system put into their home! They are low on cash and cannot afford things like this. This was a entirely hard process. I had to set up an appointment with an Heating and A/C specialist! She had to come to the household to do measurements and size up the house. She needed an appropriate measurement for the household to know what size Heating and A/C system my neighbor would be needing. This is pressing so that the Heating and A/C machine does not have to work as hard. I wanted to get my neighbor a ductless mini-split system. This was the easiest because I would not have to install ducts into her house. That would mean tearing apart some walls and putting the ducts in. It was all too much. The ductless mini-split also gave her several benefits, and she could have zone control where different areas of the household could be different hot and cold temperatures. This would benefit her in the long run by adding years of life to her system. This is because the system would not have to work as hard. I am cheerful to say that the surprise was successful and she had no idea until she walked in and saw the system.