This tag involves characters needing to have sex to reach a certain end goal or compromise usually reluctant or willing to do so, Some of these scenarios may include plots like You have a erection fine i guess i'll help you or To pass this door you must make me cum or something like that, If a problem is or needs to be solved with sex this is the tag you would use. (The questionable_consent tag could be used in a lot of these scenarios but definitely not all of them) (That is the best way i can describe this tag)