If a dick is long it is big even if it is thin. A seven inch dick thats a bit pencil thin is a long and therefore big in that respect. The pics dont seem to me to be good examples of thin. Ive seen a few guys with notably long, yet notably thin cocks.
Its unusual.
How we feel about it, if we care at all, is a separate matter. If we are size queens, even if embarrassed with our selves for being size queens, we might think thick when we think big and reject thin for being thin. Its in our heads but with sex, what isnt?
For oral sex, long and thin could be the best possible. Long is sexy and thin is convenient. If a guy is long and thin, he shouldnt sweat it. If someone doesnt like it, someone else will go nuts for it. Absolutely, someone will go nuts for it. Mostly guys, and gals, are sexy for the way we act, for how we carry ourselves, for how we take care of ourselves. Often, if we think someone is sexy, we like their equipment because its their equipment, and certainly a dude with a long tool, even if its skinnier than usual, has himself hot equipment. If he needs to join a gym and get himself appearing hotter in other ways, he should go for it; he doesnt need a new dick.
If one of us is the other person, if we are hot for someone with a long, pencil shaped dick, we shouldnt be embarrassed. I think its intriguing. If we think its hot, it is. Or if not, if a guys a turn-off to one of us, what can anyone do? If one of us meets a guy with a pencil dick and we think its weird and dont like it, dont waste his time, someone else will go nuts for him; dont waste our time on the wrong guy, find the right guy.