Maybe try rewording your 1st post in some way that doesn't appear to ask exactly that?
You've been here long enough you should already know asking "what breed is best for fucking?" is going to get you flamed to hell and back, so I won't bother saying anymore about that.
You don't want to name the breed you have in mind.....Ok, fine, it's the digital age for fucks sake, you have access to the entire collected wealth of human knowledge (and stupidity, but that's another post entirely......).......................so........maybe aquire the breed info for whatever breed you have in mind, and then COMPARE those numbers you find to OTHER DOGS you know people here own..........maybe draw some conclusions based on that?
Since asking for what you really want to know directly is going to bring you nothing but grief here, why not instead collect relevant information and then draw conclusions based on that?
Aside from all the other issues asking directly has, you also have to contend with the concept that everyone and every dog are going to be different, what works for one situation may not work for yours.
You've seen videos......and pictures......and god knows what else. A Chihuahua will do the deed. A Great Dane will do the deed. BOTH will have aspects that dont factor out in your favor so you're likely going to have to be in between those extremes.
Personally, I think worry about naming the breed is nonsense because there is no possible way anyone could even begin to identify you by breed unless you own the LITERAL only one in existence. Or you post pictures of the dog online and scream to everyone that it fucks you. And that last problem you could have equally with ANY dog that has specific color patterns or coat characteristics.