Somewhere between 24 and 72 hours.
That’s how long lady pandas get sexually aroused.
Sounds like a long time until you discover it only happens once a year. Curious? You can glimpse some record-setting (and probably NSFW) panda action here.
Hope it’s as good for you as it is for pandas,
P.S. Panda sex may not involve condoms, but people sex does. Watch real people talk about why they wrap it up.