Pheros on clothes - do they rub off less easily than on skin?
How does cotton compare to other materials?
Do they last longer?
Thanks! 
Pheromones need the bacteria on skin to help with proper diffusion. This has been discussed many times and is included in the introduction section: An Introduction to Mones: Names, Size, Strength, Use, Effects & Duration - #11 by SteveO
You can apply it anywhere you like, but of course when you apply to clothes you are basically adding concentrated body odor to clothing that most likely will retain that lovely stank
I’ve tested a ton of different materials and mones work just fine on clothes.
I do leave the mone-covered clothes outside to dry for a night, though. I don’t like sleeping with the stuff and it tends to de-sensitize and distract me.
I haven’t really looked for differences between materials.
The mones work when applied on clothes but you’ll need a bigger amount to get the same effect as when you wear them on your skin. The cloud doesn’t seem to spread as far either.
I only put stuff like nols on clothing if I’m gonna be out and about for a prolonged time and know that the stuff won’t last on the skin. Androstenone lasts, especially in oil form, so that I always keep on my skin. Besides, the smell would probably be quite a chore to get out of fabric.
Good description . Probably why you need more is that the amount needs to penetrate the clothing and mingle with the skins bacteria thus creating diffusion. The clothes are simply acting as a sponge. I’ve ruined many good shirts not being able to get the stank out!:o
I really don’t see why bacteria would be required for diffusion. What’s the mechanism there? I’ve gotten good, consistent results from clothes that didn’t come in contact with the skin.
A few mones seem to be converted to other beneficial substances by bacteria. I’m not sure which ones.