Why velvet / satin always * outside * of an outfit, not the heart * *?

I have a tracksuit adorable that I bought at Victoria's Secret centuries ago (the kind that nobody is in fact the track .. ^_~), and is manufactured from deep wine red velvet. I went to put on earlier, and realized that if the * outside * was soft, velvety sensual the * inside * was irritated and not all that sweet. This is the same way with clothes of satin or silk or velvet, satin or soft as the fabric that I do not know the name of ... It's always great on the * outside *, but * not * on the part which is against my skin. Why is this?

I am no fashion expert lol, but I'll try to give as clear and concise as possible answers. clothing materials such as velvet and satin are generally of high quality materials known for their durability and elasticity. (Apparently, they are resistant to flame, but as I learned in high school AP Chemistry ... Few things are truly resistant to flame * *...

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