Amyl Nitrite (Poppers)

An initial head rush that lasts a couple of minutes.
Sniffing poppers during sex can make orgasms feel like they last longer. And some people say it enhances their erections.
May help relax anal sphincter muscles.

The effects don't last long and can leave people feeling sick, faint and weak. Especially if taken while dancing.
Some men have trouble getting an erection after sniffing poppers.
Poppers can give you an extreme headache.