I love it , my wife is actually pretty good at it too .
I like when she goes slow , not really a fan of getting it slammed in fast , but I am ok if she's feeling a little frisky , but she also knows how far Im good for.
I'm into the soft ones so this is also harder to actually do fast as it tends to bend when she gets down n dirty .
Both of our favorite is the squirting one she fills with cum-lube and when she's had her fun she squeezes the balls and the lube squirts in my ass .
Kinda nifty thing ,