Craving weird smells?!

Mama
Anyone else craving weird smells? I'm 31 weeks and have a thing for the smell of damp and chemicals. Aquatic shops, the fish tank, damp towels & flannels and certain cleaning products. I had food cravings with my first, but this time it's definitely smells. Anyone else 'suffering' from this slightly freakish behaviour? And could it be linked to baby's sex? x