All of the meathole scenes are pretty merciless, but Venus' in particular is great...the end part where she's bent over the couch is just ruthless. especially when the stuntdick pins both of her arms behind her back. Its hard enough for long enough that even kahn (at least it sounds like him) can be heard in the background saying "alright..u can come any time now..."
you know its merciless if he's telling you its time to ease up.