Dirty joke from tv show “friends” I dont get?

[Anonymous]

First time watching the show and im loving it so far. Im on season 3 episode 2, “the one where no one’s ready”, and there’s one dirty joke i didn't get. Rachel was having a hard time picking a dress for ross’ big night.
•••
Ross: Im sorry i thought it looked pretty
Rachel: Ross that was a Halloween costume. Unless you would like me to go as little bo-peep.
Ross: Look i didn't recognize it without that inflatable sheep.
Rachel: Yeah which, by the way, chandler, i would like back one of these days.

*laugh track*

(After a minute)
Chandler: We used them as pillows when we went camping.
Ross: What?
Chandler: The sheep.
Ross: Hey, what you do on your own time...
•••

I looked them up but i didn't get answers. Appreciate it!

[Giggletr0n]

It's a joke about inflatable sex dolls, just this one is a sheep, she is not making a joke about how he sleeps with animals or something but rather that he borrowed an inflatable toy and it was funny to draw a parallel between the two

[humanearth]

Having with sex with sheep joke. It was thought it was commonly know that farmers and ranchers had sex with sheep

https://m.youtube.com/watch?v=HNMq8XS4LhE

[humanearth]

Only a few did, but it became folk lore over tge centuries.

[Anonymous]

There's inflatable sheep you get from sex shops, it's meant as kinda a joke for stag does but there's a hole in them. Chandler saying he used them as pillows and Ross is implying he shagged it

[chriscdi]

possibly that he used it to masturbate I don't know i would have to see it to understand it

[PondyPand]

Blow up sheep... Blow up sex doll...

[Anonymous]

That he had a blow up sex doll

[Lyndsielee666]

Blow up sex dolls...