Or he just really doesn't like the idea of being the Bill to her Hillary! The career/family paradigm - the great unsolved issue of all three major iterations of feminism - is such an interesting topic. I know a number of guys who are clear that they don't want to bring up kids in a household where both parents work full time. They're happy to be the one who pauses their career to achieve this, but a number of women they've dated are quite hostile to the concept. A fascinating part of our current culture/attitude to work.