Hard to tell. Lol! I don't typically plan out my jerk sessions in advance, I just kind of hop around and see what's doing it for me today, might be zoo, might just be mainstream couples porn. Might be Hentai or cartoon furry porn. My big problem with zoo, is that sometimes I think I've already seen it all, sometimes I click through ten videos and be like, "Seen it...Yep, seen it...Seen that one too."
But I'm off work today, so I can guarantee there will be at least one jerk session.