It took me 24 hours to realize why this was funny....
Rancher (winking): Yeah, and Stephan heard that (so and so) has an old cattle ultrasound for sale!
Me (clueless): Uhhh, yeah, the vet already preg. tested our cows.
Rancher's Wife: But you know.... (wink).
Me (still clueless): Ummm....
Rancher's Wife: For when it's time....?
Me: OOh, yeah but the doctor's office has an ultrasound also.
So, seriously, I didn't think anything was funny. This morning I googled "Cow ultrasound" and this is what came up. If you can watch more than 2 minutes of this bravo- you should be a vet or/and rancher.