http://www.bloodhorse.com/stallion-register/stallions/127186/tapit
“Meet the $300,000-a-Pop Stud That’s Dominating U.S. Horse Racing”
"The stallion, a striking ghost-white specimen named Tapit, is escorted into the breeding shed, where a mare awaits in one corner. He’s fitted with a leather muzzle — to prevent biting — and then, with some encouragement from the five handlers orchestrating the moment, mounts the mare. After a whinny and a swish of the tail, it’s over, and he saunters back to his field in the heart of Kentucky bluegrass country.
Tapit will repeat this routine some 135 times this year.
Each time he does, his owners will collect a fee of $300,000. It is a staggering sum of money. Even after factoring in the typical number of fee cancellations due to failed pregnancies, the horse will generate some $35 million in revenue."
What do they mean by “encouragement”?