Bats in India have a good thing going on: Scientists analyzing a colony of about 420 fruit-eating bats there observed males performing cunnilingus on females, LiveScience reports.

Over more than 13 months, researchers saw 57 cases of sex, both intercourse and oral. Males gave oral sex for an average of about 50 seconds, intercourse for another 10 to 20, and more oral for another 94 to 188. Scientists noted that longer pre-sex cunnilingus led to longer copulation, which may enhance conception. Or the males may give oral sex to clean off the sperm of other bats, but that “would be maladaptive after mating, as there is a risk of removing the male’s own sperm.”

Read more: Newser