I remember some old threads on this forum and some other ones about the usage of copulins to attract other WOMEN. That’s right, copulins being used on men to attract women. Something about social proofing.
I’ve heard it was quite effective.
I hear all the time about the “wedding ring effect”. What if it isn’t the wedding ring but rather the scent of a female on another man.
Has anyone noticed or experimented using the, ahem, vaginal secretions to attract females?
That is the basic concept of Instant Jerk.
IJ had its cops removed some years ago. Data4 has some good posts on mixing them back-in if you want to try that. 
Using cops for social proof is a fickle thing IME - some women will indeed respond very well but equally a lot of women are not at all tuned-in to a cops vibe.
IME cops are valid in ONS-type mixes but not if you are looking for LTR-potential as the women most tuned-in to cops also seem to be amongst the most issue-laden, validation-seeking, difficult or otherwise unstable. Oh and pros - I have never had so many offers of commercial sex (apart from the time I worked a few months in Amstedam!) as I did when I was working with cops. So tread carefully!
A314/cops/P74/P93 plus a sexual like TUTH, NPA or IJ - was one combo that did very, very well indeed for me!