What kind of friend's are we and is this normal?

Hi I'm imma use inntails for the people involved. Me and my ex boyfriends D are now very close In fact. Our little squad of 4 people are very close. We are very sexually open. There's 2 girls and 2 guys. We all are very sexualy active. We could litteraly fuck next to each other, And we have. Me and D have 19 times and me and A fucked twice and me and the other girl s have only fingered each other. A and D could have some hoe I'd girl over and we all get drunk then we hall have a 5 some. And then after she leave we all fuck again most likely then just chill and play fucking Xbox and eat fuckimg cereal. Now listen I'm asking if it normal because each and everyone of us have fucked and we do so with feeling of any kinds and still remain great friends. But the thing is we are still 16-18. And have evolved a fuckship ( friendship of sorts). Do you think this is ok or normal???.