What do you mean "real thing"? Pegging is a heterosexual practice in which a woman performs anal sex on a partner by penetrating his anus with a strap-on dildo. It is real when you do it. I'm guessing you want comparison between the dildo and a penis. Well, there is enormous market of sex toys made of different materials and sizes to enhance visual or sensual experience, I'm sure you can choose something that is right for you.
