Yes, I know this is a bizarre question. But, I’m writing a letter to my ex and was curious if pheros only work if applied to skin or if they have any effect on an element such as paper? Again, may be an odd inquiry but distance is an issue. Thanks in advance to any and all responses. 
Cheers,
Lulu
I recall the subject being discussed before in various “stealth delivery” threads and posts (gegogi mentioned “doping” a resume I think) but not sure if anyone ever determined if there were any valid results. Others have mentioned “dosing” things like stuffed toys, t-shirts etc as well. (Like conversation-inducing Instant Openness on to party favors or gifts…)
I’m not sure if the pheromones would still be at an effective strength by the time a letter or other similar item were delivered. It’s said pheromones can linger on cloth, so maybe a “rag” or high-cotton content paper might hold them for a while.
No they dont work well on paper for attraction purposes unless your wearing the paper on your body LOL.
One, he has never smelled the pheromones on you, I assume so he will not associate the smell to you without your body present.
Two, you have to mail it, I assume and while it may make the mailman who picks up the letter a little hot it will diffuse well before it gets there.
Now if your looking to just give him a certain feeling then you may be able to pull that off with certain pheromones.
Instant Shine would make him feel good. Instant Honesty or Instant Openness may make him more open to reading the letter if by chance he is reluctant to. You would probably have to put the letter in plastic wrap though to stop diffusion sort of like when we get our packages from Androtics and they have been sprayed with Instant Shine.
Cops of course you could not use they would be so smelly
Tisha
lol! that made me giggle! hahaha! 
The PheroBabes spray every package with Instant Shine, but of course its the green bubble wrap that really makes us all smile.
Since you mentioned it SteveO, I love the green bubble wrap. I sit around popping all of the bubbles with a big dopey grin on my face whenever I get a new package. It’s almost as exciting as getting the pheromones themselves…
On topic Lulu, I think it would be more effective if you sprayed the letter with a perfume that you wore during the good times you two had. Scent is the strongest sense tied to memory, so don’t discount it. Pheros are great sure, but scent can be even more powerful in it’s own way 
Going along with what Rbt suggested, if you plan on doing this, you should probably pick a heavier, grainier paper type so it’ll hold the perfume as long as possible.
Good luck!