Certain opiates like Heroin and Hydromorphone are VERY efficient plugged, so you guys can't say plugging is a waste of opiates. With opiates like hydrocodone and oxycodone that have such good oral BA's it is smarter to take them orally, but there are opiates that are much better to plug. To the OP, to plug the right way you need to crush up the drug, dissolve it in water, and shoot it up there with an oral syringe. Use vaseline on the end to make it more comfortable.
Oh and by the way guys, there is NOTHING homosexual about using drugs rectally. Taking a dick up your ass makes you gay, not enjoying a substance rectally. Generally people who are insecure about their sexuality are the ones to jump out and instantly say it is somehow homosexual.