Well, clearly for fun...again, who wouldn't want to have sex with many beautiful women without having to think about the complicated and unpredictable game of seduction?
I think that it's not entirely a bad thing for dating either, the feeling I am getting is that this really will allow me to focus, on a real date, much more on whether I ACTUALLY want to be with the girl or not. Men (maybe it's just me) have trouble being honest with themselves about why they dig a girl. If you really want to sleep with her, it's hard not start to think you want her in other ways, you stop being rational. I actually think that seeing SPs will help me break that pattern because, well, I KNOW I will be having sex with a hot girl next week anyway. It means you can be far more indifferent to a prospective girlfriend's hotness...bonus, girls seem more attracted to guys who seem relaxed and somewhat indifferent to them.
I don't know how I it will be as I get older but, right now, I can date girls in the same age range as the SPs (well more 25ish than 20ish) so I don't know if it sets up unrealistic expectations of who I could date.