Comment: Sure I care about procreation: I have three kids, as many as I could afford to raise.  In between and after kids, I have sex because, despite the inability to have more kids, I have the urge to engage in sex (I get an erection) and there is one place that God made it obvious, anatomically and physiologically, where it's intended for insertion.  It's not the mouth and it's not the anus.  

Explain to me how inserting it into the anus makes sense to your sensibilities.    It's not the inability to engage in real sex, is it?