How Can I Recreate the Ecstasy of Pregnant Sex?

Dear Dr. Betty,
Why is it that my sex life becomes so much more physically satisfying when I'm pregnant? My breasts actually become erogenous zones that I want my husband to play with and I enjoy really strong, powerful, intense, wonderful, screaming orgasms! (Lucky me!) This is my fourth baby, and we are done! How do I recreate these physical conditions/sensations after I deliver?
I'd really like to keep this intensity and physical enjoyment. Note: Non-pregnant sex is wonderful, but pregnant sex is just soooooo much better.
Thanks!
JD