What's more important to me, is about what is right and wrong, rather than trying to play with semantics to get definitions.
The practice of a married person having sex, act or thought, with anyone else is wrong - basic biblical meaning of "Adultery".
Everything else is grey and open to opinion.
Sex is gift from God, and should be treated as any other gift, wisely and received in the right place at the right time for the right reasons.
The question is - what is right time, place and reason ?
Is it only after marriage ?
Before anyone gets married they should assess mutual values and determine compatibility with that other person, to help ensure a happy, and long lasting marriage.
It may or not be relevant to check sexual compatibility, probably after many other checks have been made.
When I got married, many years ago, I didn't do this, and was heartbroken to find out after we got married that my new wife and I were not sexually compatible. Many years of unhappy marriage followed eventually leading to divorce.
So now I am single and wouldn't make this same mistake again, but would only consider physical lovemaking to someone who I wanted to marry.
If you are familar with the Alpha Course, you may know a publication called "Searching Issues" written by Nicky Gumbel, where 4 dangers of sex before marriage are mentioned . 1. Unwanted pregnancy 2. Sexually transmitted Infections. 3. Sexual Jealosy (having had many partners when you eventually get to the marriage bed) 4. Continued interaction (relating to someone you have broken up with, but had a physical relationship with).
Well, I have had a vasectomy, been checked for every STI in the book and don't have anything, have discussed pervious sexual partners openly and freely with my girlfriend without any problem, and can interact with previous partners no problem.
But despite me dealing with the "problems" of sex, this doesn't give me carte blanche to do what I like - absolutely not. I still have a responsibility to act in a responsible matter treating everyone with dignity and respect, not harming anyone and searching for the right outcome in everything I do - to be happy.
Loving thoughts
God bless - Simon