We're not really going to be talking about sex here. In a culture where people are expected to ignore the possibility of sex with most potential partners, we have to expect that sexual behavior won't give us much insight into sexual states. We have to focus on sexual feelings, not behavior. Although it's hard for some people to believe, different individuals experience sexual desire with very different intensities. Its not that some people have better controls, its that some have more to control.
Nobody can choose how horny they are.
While its possible to supress sexual interest when it appears, nobody can choose how often it happens. There are people who try to suppress all of their sexuality, for example. Some monks and nuns, to name only one such group. They can often stop their sexual thoughts and feelings before they have really formed. But even they cannot choose how often they will have to do it.