nope. the trick is not in the mind, the magic is in the skills behind the fingers and tongue. tongue and fingers are targeted stimulation, usually on the clit, the g-spot, the basic points of high arousal.
one finger poking away at in your vagina doesn't get you off. two fingers sliding back and forth, pressing down against the bottom wall of your vag will get you off. two fingers curled up, either in a come here motion or small circles on your g-spot will get you off. a tongue all warm, slippery and probing will get you off.
fingers, tongue, lips, hot breath, soft stubble, his chin, his nose, being watched while he goes down on you will get you off. having someone literally make out with your pussy will get you off. the teasing, the torture of being held off and then flung over the edge will get you off. hands under your ass or holding you down will get you off.
i won't lie and say there isn't a visual or psychological impact to a large cock. they're beautiful just by being rare, coveted and the ideal. this is where the brain/mind comes into play. far away from pink parts and talented fingers. the combination of physical stimulation and mental titillation is lethal. you can get off from one touch, his fingers under your chin, on the nape of your neck just before he kisses you. i could die. just melt away and die.
some boys are so fixated on tab A + slot B = orgasm they forget the grace of skill and passion.
ML
it helps if he has HUGE hands and a really LONG tongue. *snicker*