Everybody's got their 2 cents to put in. Obviously some people like it, some don't. Some people like broccoli, some don't. Some people like being shit and pissed on...I personally don't, that's just me.
When it comes to pregnancy, how do you think she got pregnant? Sex. As some have some pointed out, pregnant chicks are normally hornier than ever.
The reason guys are attracted to boobs is because it makes girls look fertile and suitable for reproducing, and then feeding an offspring (this is all subconcious). We're (guys) hardwired to like that to give us a better chance of reproducing successfully. That's why girls develop BEFORE pregnancy. Breasts serve no purpose prior to pregnancy other than to attract mates (hey, it works!). No other mammals develop breasts BEFORE they give birth. The bigger the breast, many people here will agree...the more attractive. Again there's always exceptions. Some people prefer flat chest girls, some people prefer animals, some people prefer members of the same sex, etc. Just about every possibility is real for at least 1 person...but on average, most guys are wired to think:
Big breasts = fertile (subconciously). Big hips = fertile. Obviously, pregnant = fertile. If you don't dig it, that's allowed. If you do (like me), there's no shame. It's perfectly natural the way I see it.
Nadine looks awesome. (ok maybe that was 3 cents...)