A good point of discussion to bring up is biblical vs legal sodomy.
Some biblical scholars say they bible is actually more lenient than many former U.S. sodomy laws, in that anal and oral sex are not explicitly forbidden between a heterosexual married couple in the bible, but they have been forbidden by state law in the U.S. (though rarely enforced).
Oh yeah, check Song of Solomon. Chapter 2 verse 3 describes a woman giving a man oral, and in several places it alludes to a man giving a woman oral. God made sex to be fun.