In the ass!

Brent was starting to get horny, he could feel his cock start to protrude from the sheath,
as he watched Karl's huge cock grow.
“Bend over” he said. Brent felt the tip of Karl's huge member against his hole. “You like that?”
“Slowly now-aughh yes! yes!” Karl had suddenly rammed his massive dick into Brent's tight ass, stretching it out of proportion.
“Good doggy” Karl nickered as he rammed his cock deeper into Brent's tortured ass.
“You like that, don’t you” Brent felt Karl's dick drive even deeper into his bowels sending
another wave of pleasure through Brent. Karl pulled out again, only to ram forward again, impaling Brent on the full length of his shaft. The equine began to pump his shaft in and out of Brent at massive speed, ramming Brent's tortured ass. Brent moved with him as Karl's movements became faster. Suddenly Karl shuddered, and Brent felt the equines balls churn against his own as Karl began to blow his load. Wave after wave of cum blew out of the massive member, filling Brent's intestines.
“Thank you” Brent moaned as Karl pulled his already shrinking, but still massive dick out of Brent. Karl sat down to relax, but Brent wasn’t ready to stop, and wanted more.