Jennifer - you "lured" me into reading this ... I am not an expert ... BUT I will admit
that there have been times when I have entered the "not nice" fantasy zone and I got more turned on than I expected, and the *o* was more powerful. I think that it's a combination of semen and the orgasmic reaction that helps you out. BUT it's all completely dependent on whether baby is ready to come out!!! We had reasonable sex for 2-3 weeks before DD2 was born ... maybe we should have been a little kinkier!
DH isn't allowed touch me til next Monday. Which is kind of a bummer because we were planning to have a nekked photo session sometime soon, and that might turn me on ... but my bathroom is going to be retiled starting tomorrow, my MW husband is waiting on a corneal surgery, they might be going away for the weekend, and I've scheduled an afternoon potluck at my house on Sunday! We're not doing *anything* that might trigger labor!