You are mixing up two things. Rush was hooked on OxyContin, a drug made from opium. Prescribed for pain but sometimes used as heroin. Oxytocin is a hormone released while breastfeeding and after orgasm, a warm, feel good sensation that is probably meant to increase closeness. I have no idea about Limbaugh’s orgasm history but I’m pretty sure it was OxyContin he was abusing.
after orgasm,..
No wonder I've not heard of it. ;^)
(juuuust kidding)