I have an "alternative lifestyle" couple, Ava and Bianca, who keep getting the adoption want.  The in-game hints indicate you should call the adoption people under the services option on the phone.  Problem is the only adoption option that comes up under services is pet adoption.  I'm pretty sure Ava and Bianca were wanting to confine the adoption to their own species despite their somewhat more open minded frame of reference.  Can anybody figure out why adoption isn't even listed as a call option for them?  Is there a same sex couple bias built into the game?  A glitch in my particular installation of the game?  A past misdeed by one of them that is disqualifying them for adoption?  If it makes any difference Ava was created as an adult and Bianca is a pre-packaged Sim who comes installed in the game (yes, THAT Bianca - Patrizio and Isabella are still adjusting).