Many feminists are pro-abortion because it strengthens their hand, with rights and choices. Feminist rhetoric has saturated the issue, which is why women have complete control over the abortion decision and men have none, even though the man will be expected to pay child support for the next 18 years if she has the baby.
That same portion of feminists are anti-prostitution and anti-porn because those things are worse for them. Prostitution and porn don't help women, and do help men. It lowers the value/price of the woman parts. So in a world without porn or prostitution, men would just have to pay a much higher price to gain access. Deal with worse female behavior, or whatever. Porn/prostitution serves as an alternative. If that girl you met is too much of a self-absorbed psycho, you can walk and just look at porn instead.