Why interesting (enlighten us heathens)?
Perhaps only interesting to me.
The usual reading is from Corinthians, in which St Paul tries to instruct those attending weddings in how to behave at the party afterwards. So as not to end the day in a punch-up.
"Love is patient, love is kind. It does not envy, it does not boast, it is not proud. It is not rude, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. Love does not delight in evil but rejoices with the truth. It always protects, always trusts, always hopes, always perserveres."
Beautifully parodied in Four Weddings and a Funeral ISTR.
Bill and Bob had:
I appeal to you, brothers and sisters, by the mercies of God, to present your bodies as a living sacrifice, holy and acceptable to God, which is your spiritual worship. Do not be conformed to this world, but be transformed by the renewing of your minds, so that you may discern what is the will of God - what is good and acceptable and perfect. Let love be genuine; hate what is evil, hold fast to what is good; love one another with mutual affection; outdo one another in showing honour. Do not lag in zeal, be ardent in spirit, serve the Lord. Rejoice in hope, be patient in suffering, persevere in prayer. Contribute to the needs of the saints; extend hospitality to strangers. Bless those who persecute you; bless and do not curse them. Rejoice with those who rejoice, weep with those who weep. Live in harmony with one another; do not be haughty, but associate with the lowly; do not claim to be wiser than you are. Do not repay anyone evil for evil, but take thought for what is noble in the sight of all. If it is possible, so far as it depends on you, live peaceably with all.
Romans 12: 1-2, 9-18
Not a bad choice really, probably trying to say something about their approach to their public life as well as their private relationship.
Crusty and I had a reading from Philippians, which was also an unusual choice for a wedding. It means something to us though.