In my case, I do not feel the pressure of 'religious values'. well, may be, indirectly. But I do not want to limit that into religious reason only. It is like, Biologically there is no harm in having sex with your cousin. There is no concrete reason that having upsidedown flip-flop at your room brings bad luck, but you will turn it right way if you see it. Or like, smoking marijuana is less harmful than smoking cigarettes but it is considered immoral/illegal. You would not try it or at least hesitate to smoke it even after you know that there is no harm trying/doing that. Its like that... its abstract. thats my case.
In addition to that, I tend to keep boundaries to myself so that I can approve myself as 'morally good standing'. Though my parents know that I smoke cigarettes and they do not say anything, I do not smoke 'in front of them'. Its a respect, you may say. But for me its not respect since I already disobeyed them by smoking anyways. Its the boundary that I created, randomly, that I will not smoke in front of parents no matter how much they approve. Its like that... I decided not to eat beef coz I want to stay the way I am. That creates the boundary for me. One day I might cross that boundary but the day I cross that, I will not feel good. I am just avoiding that feeling by not eating beef.

Does it make any sense to anybody?