I myself don't care if it happens it happens. With my ex she was very religious and wanted to wait so I said fine I put no pressure to it, but in the end she cracked and took me in my sleep
It's biological you can only fight it for so long and whatever helps you go longer then better if thats the way you want things to be. I don;t see any reason why marriage is important in being ready to commit to such an act, and personally I beleive it helps the relationship in the end.