Are you having a BOY????? Reason I ask is b/c with my 2nd pregnancy I was the same, wanted DH probably too much in the 3rd tri and I have heard it's b/c you are having a boy. The male hormones are racing through your body LOL
We never found out what we were having but when I look back on both my pregnancies I was way more horny with DS than DD's. Dreams included.
I have a friend that is a head midwife and she said that you would need to have sex 20 times to produce enough stuff in the sperm that brings on labour and I'm sure most of you'll agree, that aint gunna happen when you are heavily pg!