Having a bigger cock isn't necessarily all its cracked up to be.
I have only ever met ONE provider who could take me greek and ONE other provider who could deep-throat me.
I can't tell you how many times I've tipped extra for greek only for it to be a no go and how many lame ass mouth "around the tip" only bbbj's I've had.
I get to read reviews about girls giving awesome greek then I show up and it' ends up with us trying to work it in slow with heavy breathing, cussing and tons of lube just to end up being a mission failed.
Also, if I don't bring my own covers and the girl only has regular ones they hurt like hell and squeeze all of the blood out of my erection and usually end up with it being a bbbj only session even though I donated for full service.
So yea, it can be a pain in the ass (pun intended)