DH didn't seem to be lazy at first. When we first moved in together we were both a bit lazy, and then would blitz things together. Laundry was done by whoever was lowest on clean clothes, and although I did nearly all the cooking (which I enjoy) he does all the driving (I don't drive) and anything involving electrical gadgets and wires! We both worked FT and it seemed fairly even and respectful.
Then when DD was born, the amount of work went up drastically. With all things housework I stepped up and did more, DH didn't, but we did share the childcare. When I went back to work the unequal split became more and more apparent, we would argue, DH would pull his finger out and all would get better for 2 weeks, until it slipped back. DD is now 3 and we finally seem to be on a more even keel again.
DH isn't very good at housework, which is tough shit. It's still his job to do some of it, and he's getting better with practice. He does work a lot of hours including a fair commute. I work part-time, do some scheduled activities with DD etc, but on my "day off" I'm still looking after DD, so it's not as if I have 8 free hours in which to get all the work done. If DD and I weren't there, DH would either have to pay a cleaner or do it himself, so he knows he has to muck in.
If he's been slacking off, I will call him on it once, jokingly, and these days that's all it takes. I feel loved and respected, and he doesn't have a shrieking banshee for a wife. 
So to sum up my essay
, they're not always lazy to start with. As others have said, a change in circumstances often reveals how lazy someone is. Doesn't mean it has to stay that way, or that you have to put up with it though.