My girlfriend (26) and I (26m) have been together for about 2 years and we have a developed a pretty routine sex life. Sometimes though she will surprise me by doing things like going into the bedroom when we're hanging out and she'll emerge in lace lingerie. It makes me feel great, it's super hot and I love these surprises but I'm starting to feel like I dont have any idea how to reciprocate these actions. I want to be able to surprise her too! I'm in good shape but otherwise but I'm a 26 year old mega nerd. Any suggestions for things I can do from my end to surprise her?
Tldr how does one do a sexy surprise?