I get broody. It's very rare, probably once a year or so, and it only lasts for a couple of days when I'm likely to suggest to a male friend that he should give me a baby. They're never interested when I then tell them that no sex will be involved.
I'm quite attuned to it now though. And being around somebody else's smelly, screaming baby usually snaps me out of it.
My flatmate was showing me 10 million pictures of her baby niece last week. It was the freakiest child i've ever laid eyes on!! She soon took the photos away when she saw how I glazed over.