As a guy who has been a bull for over 12 years I often tell couple's "what you to screen for what you then, you get what you get"! The lifestyle is ever increasingly becoming more popular and more bulls of less quality are seeing this lifestyle as easy pickings for getting laid with their wack ass sex game that gets them no call backs out on the open dating market! Some of the same guys who can't make women cum after taking them out on dates and getting ghosted are finding their way into the lifestyle and trying to bypass all the dates and give away that weak pipe!
My advice if you want hung screen for hung. Ask the guy what he's working with and ask for proof. If you want stamina ask him how long he can go? If you want a guy with experience then ask him how long he has been in the lifestyle and what experiences has he had?
Also remember some guys are only interested in getting laid so satisfying the woman isn't really on their mind and that too you should be screening for by simply asking "how important is your partner's satisfaction"?
Some of us bulls out here love sending women to the moon but find it a challenge to find the one's that will let us keep them on the moon all night long! LOL
Ok hope that helps!✌