Is it normal that me and my crush get turned on with a superhero fetish

Hey all,

Lucky for me my crush lives about 50 meters from my house. And we are both open minded and shameless. We talk alot and we came agross a thing we have in commen. We both have a superhero fetish and joke about that with each other. She wants a leather (sexy way) catwoman outfit. That should make me batman. But she finds it way hotter to think about fking someone that can shoot webs. We both are planning on buying the costumes and have are way with the fun. Is it normal to think about f*ing eachother in this way? Its some kind of roleplay superhero fetish.