in order to unlock the sex easter egg we will need to open pizza tower (if you dont have it then wtf is wrong with you), this is because you need to make sure certain data is saved and then transferred between the two games

once in pizza tower you need to go to world 3, then go to crust cove https://gtm.steamproxy.vip/ugc/2265940681584818721/C9E3931E5210C7211DC9DB4453B10BE94BC0D84E/?imw=256&&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false (enter this door) then once you reach this cheese enemy https://gtm.steamproxy.vip/ugc/2265940681584819234/78D5554CC5FA761439601907E00635CF46AC2876/?imw=256&&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false you want to suplex him into the nearby water like this https://gtm.steamproxy.vip/ugc/2265940681584819623/17A0D7444C962AA6D247D551B5781B148B97D5D0/?imw=256&&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false (you grab him then jump above the water and input groundpound) once you do this correctly then just beat the level normally and then your'e done with this step (make sure the game saves before closing tho)

now that that's done open super ufo fighter and go to chapter 3 in the story mode menu then hold q on keyboard (or l3 on controller) then enter the chapter normally and you should see a brand new cutscene (if not then you might have made a mistake earlier in the process and need to try again) https://gtm.steamproxy.vip/ugc/2265940681584816848/8E8A29AE2B46DEB7949604CECD89984F549B3E6F/?imw=256&&ima=fit&impolicy=Letterbox&imcolor=%23000000&letterbox=false