Most Helpful Guy
It depends on the guy's level of experience.
I mean, if a guy is attractive, if he's not nervous socially, if he's athletic or otherwise socially interesting, he's not going to have any trouble making friends and getting close to people early in life (especially high school). He's more likely to be somewhat popular in high school, and more easily successful with girls. So, he's more likely to be experienced.
After a guy finishes college, he's what? 21? So, 18 year old girls (i. e., freshmen) are still not "so young" that it's "awkward" or a "no no."
So, there's literally a "split."
On one hand, from 16 through 21, some guys have been having sex regularly, and they've been getting a better idea of what they like sexually (and what they don't like, or what they have no patience or tolerance for). Also, because of their experience, they've been able to overcome their approach, initiation, and performance "anxiety" with a female partner.
On the other hand, from 16 through 21, some guys have not been having sex (at all), and they have no idea what they like sexually (other than what they "think" they like or dislike). Also, because of their lack of experience, they have some approach, initiation, and performance "anxiety," and may not feel completely confident and secure in their ability to genuinely satisfy their female partner (particularly one who they know sexually satisfies them greatly as a man).
So, you can expect the "preferences" to largely be split depending on life circumstances and experiences.
On one hand, it's very understandable why some men would prefer women with little to no experience. These women have no baseline or barometer of what 'good' sex is, and so, anxieties and fears of inadequacy or not satisfying one's female partner are reduced (i. e., the emotional distress caused by the idea of having sex with this female is 'less').
On the other hand, guys with experience generally like and prefer, "lack of inhibition," "openness," a girl that's comfortable and not insecure with her body, a girl that knows what she wants sexually, a girl that enjoys being "sexy" and "slutty" for her man, a girl that has "dispelled" idealized childhood fantasies and ideas regarding sex. So, a girl with little to no experience is probably not something guys with experience are willing to tolerate or have patience with, no matter how otherwise non-sexually amazing the girl is.
So, the next question is, what kind of guy YOU prefer.