While I would love to have a dinner out w/my partner now and then, I have no desire to leaves my son either. (Dinner would take 2 hours max which is about as long as I can be away w/o getting antsy.)
It drives me a little nuts when people give me these "knowing looks" and say, "I'm sure you could use a break!!" I'm like, "Uh, I could use a maid, or a personal chef, but I actually enjoy the time I spend with my child. It's all the other crap piling up that's driving me nuts!" I think it's absolutely fine if/when mamas do take time off but the assumption that I'm desperate for it is offensive.
mom to DS born 5/29/09, DS #2 born 5/2/2011, partner to a PhD (finally!), pleased to be co-sleepin', lovin' our 3 cats and 4 dogs and raisin' our LOs vegetarian.