Gay sex and poppers

When gay guys snort poppers while having sex, the combination of temporary ego loss and becoming a total sex-pig can tempt them to do riskier stuff than they might otherwise.

Gay guys who use poppers while they're getting screwed often feel it helps them loosen up their sphincter, but it also enlarges the blood vessels in the anal lining, which might facilitate infection by HIV, should a couple be foolhardy enough not to be using a condom.
» gay.com

The basic effect of poppers is to cause all of the muscles of the body to relax, which is why poppers are so popular among gay men -- they make anal intercourse easier. One of the related effects is vasodilation, or relaxation of blood vessels. This gives the user a warm sensation and causes large amounts of oxygen-bearing blood to rush through the brain, thus giving the user a "rush." The increase in oxygen leads to a sudden intensification of positive emotions, thus increasing one's lust and lack of inhibition, encouraging a sense of raw animal sexuality.
» nepenthes.lycaeum.org

Sniffing poppers during sex can make orgasms feel like they last longer. And some people say it makes their sexual organs feel massive. Poppers are usually sniffed straight from the bottle and deliver a short, sharp rush. Poppers are sold in sex shops, clubs and gay bars.
» www.talktofrank.com