Men thinking women are property isn't some religious notion. I know plenty of men, most of whom are atheists/agnostic, and they treat women like objects to be owned and controlled.
And what the Bible says exactly about sex within a marriage:
1 Corinthians 7:3-4 NIV
3 The husband should fulfill his marital duty to his wife, and likewise the wife to her husband. 4 The wife does not have authority over her own body but yields it to her husband. In the same way, the husband does not have authority over his own body but yields it to his wife.
So sure, I could get on my high horse and start screaming how the Bible tells women to fullfil her marital duty to her husband and yield the authority of her body over to her husband, and I guarantee you I will have the feminists in an uproar. But you must read the ENTIRE passage! It says that each should do the same for the other! Thus it can be said that it's an equal stand.
You can't just pick and choose the words from a passage, reformat them into a new sentence, and start proclaiming it as "truth". You must acknowledge ALL the words, and do so in the order those words are written. Then feel free to make your decision regarding the passage, but for goodness sake, give credit where credit is due.