Here in India, it's kinda normal. The houses are way to small for poor and middle class people. Children upto an age of say 10 to 12 cosleep with parents. The normal is changing in cities and towns, though!

At personal levels, I don't know because I'm close to experiencing the parenthood. But, I've a plan not to affect sex-life after our first child. We live in a combined family in India. The child will sleep with the granny or gran'pa!