Great discussion. Ever since puberty I have found the prospect of myself being pregnant very disturbing. I have had nightmares about being pregnant all of my adult life, and it is always the same feeling of being trapped, horrified, dreading, angry, resentful. I know many moms who recovered fine from their childbirth experiences, but I know others who have never been the same, and it has affected their mobility, love lives, etc.
I guess I also don't want to risk permanent damage to my body, especially the fun parts. Guess I never really wanted kids, so the risk was especially unappealing.
Other people's pregnancies don't gross me out or horrify me (as long as they don't over-share). And I am sincerly very happy and excited for friends and family members when they are happy and excited to be expecting, but I have never wanted it for myself.