I still think loose women will take joy in the emotional side of seduction. It ought to be easy to find it out for sure, though. Just ask a loose woman if she cares whether or not the guy having sex with her had a vasectomy. If she does not care... then the fertility isn’t the issue with that madam.
It will exist, it always has, but it won't be very common, I'm not even sure how it would affect women when at some point in the future after decades of this miracle male birth control, they become 100% convinced that the men are not carrying potential for pregnancy.
Sometimes we forget that for the biological impulses that we see and generally talk about, that there are still deeper and unknown levels to the biological impulses and drives.