Welcome, nokyds4me (cool name, by the way!). Congrats to you, your wife and sister by choosing the less stressful CF life!!!!
My belief, re: single moos is that they're really not trying hard enough NOT to have kids. Some women want to opt out of real life (getting a job, being an adult) by getting knocked up, and hoping their boyfriend/husband will carry the freight (work in the real world, pay all the bills, support them forever, etc. etc.).
There was a great book written years ago by a woman, titled "Swept away." I don't know if it's still in print, but it should be required reading for every girl at the age of 11 or so. It presented the argument that some women get pregnant without giving it real thought, and won't take responsibility for their lives, won't commit to being adults.
These bimbos are just taking what they think is the easy way out. When the boyfriend skips out, they start wailing, "What do I do NOW?????"\\
You get a job, get your ass in gear, and get permanently sterilized, that's what you do!!!!!!
Again, welcome aboard and keep posting!!!