They are my forever favourite too , the only videogame couple I care about . I wouldnt say they are opossite , I would say complementary ; Jon needs some love to overcome the grudge he have against his own nature , and Felicia have lots of love to give . If Jon manage to accept himself , Felicia would have a companion that not only is strong as her , Jon also understand how it is being a human and a darkstalker at the same time and both have the same objective : To make the world a better place .
If you were saying this as a compliment , Thanks . If you were saying that needs the Mature Tag , no it doesnt , this picture has been reported various times , the DA staff could have Tagged it themselves if they consider it neccesary but they didnt.