http://contraception.about.com/od/howtos/a/What-Condoms-Are-Made-Of.htm (http://contraception.about.com/od/howtos/a/What-Condoms-Are-Made-Of.htm)
Guess what? One more weird place for milk...
(Not that I NEED to be thinking of this yet...I hope...but it pays to be prepared, and FA parents have to be even more prepared than most...)
Holy Cow! I never knew this, and I spend a lot of time around condoms (no, I'm not a sex worker ;-) ).
Casein is a plasticizer. I'm pretty sure it's changed to the point that it's no longer an allergenic protein when it comes to its use in latex condoms and plastics. I could be wrong. The issue with its use in condoms is primarily of concern to vegans, from what I've noticed over the last two decades.