Lie (does someone know how to "spoil" things??)

quick sketch

i dont know if i should mark this 18+, i wouldn't consider it 18+, but it does have "nudity" and some blood so please let me know. mostly asking this for future reference because i like drawing this kind of stuff and i really dont want it to become an issue :')

(also for the record i dont even know what the 18+ button does really, all i know is its there and its clickable and it should in theory hide my works from those who dont want to see it.)