I think that assuming women who support abortion are sluts who care more about sex than the responsibilities that go along with it is not out of line.
A liberal politician in the recent years said (paraphrasing): pro-life (Republicans) want the government small enough to fit inside the womb.
What is wrong with calling out a woman who has one or more abortions as a murderer? She chose to get pregnant with the intent of killing the child--how else can one describe her?
I think that going along with the fiction that pregnancy is not preventable gives ammo to the pro-abortion side. Responsible women rarely have unintended pregnancies.
That would eliminate all homosexuals of both sexes from the argument, then.