Christianity is not Buddhism. Christianity's goal is not the moral perfection of individuals. Individualism is devilish, indeed. The goal of Christianity is the good of mankind, that is, our personal goals are to match the good of mankind. If they don't, you are sinning.
Christianity's goal is the salvation of the individual by obtaining grace through the recognition of Christ's sacrifice on the cross. This recognition also necessitates living a moral life which includes avoiding sin.
Buddhism's goal is to escape the circle of death and rebirth by achieving enlightenment, which is done by overcoming attachment to the illusory world perpetuated by karma. Now that we've established that I don't think you can accuse me of having them confused.
Now, there is nothing inherently sinful about sexual desire. But, the sexual act is to be kept within the confines of a sanctified marriage because it is within marriage that sex has its moral purpose intended by God. Of course, like every issue, there's a lot of grey. But to outright assert the moral permissiveness of fornication is a rejection of the moral framework of Christian teaching. You cannot be in good Christian standing and hold to the position you do.
And this overlooking your unabashed and open heresy whilst still declaring yourself Catholic. You can't have it both ways. There's nothing I can say that's going to change your views. I'm simply pointing out that they are in unquestionable contradiction to the values of the religion you claim to hold.