No, it is not "up for debate", as it is settled in scripture. There are biblical churches and there are those who have gone astray into their own teachings on this (and other things). So it really isn't a matter to be personally determined as to whether God's requirements as to sexual proscriptions applies to you or not, if you are a believer. Many things are your own decision - whether you feel convicted eating meat or not, whether you feel right about celebrating a holiday or not...that's up to you.
Biblical sexual morality is not up to the believer. This has been violated since time immemorial and it is never right. I remember a discussion with one guy (not here) who insisted he was right with God to have a mistress because she was kind to his wife with Alzheimer's, so they all just lived together. He DESERVED this outlet for his frustration. One can make that case - and he did, vehemently - but one cannot make it scripturally. It is still adultery because he was sleeping with someone other than his wife.
Because he REALLY wanted to do it, and it made him happy, God must be fine with it in his particular case, he insisted.