I have never had sex with a pregnant woman. My ex-wife (who was extremely vanilla) never wanted children.

But since I have been divorced I have had two relationships with women who were mothers. And I agree with Tom and TeddyBear, there is something about being with someone so fertile and alive and I think sacred is the right word. Also both of these women were great mothers to their kids and they were great subs and sexual partners.

And both of these women's breasts were amazing, great large nipples and I might be naive but some of that was due to being pregnant and nursing.

Ahhh fond memories.