Yes, Graziano said the same thing, and Gorka as well, about being bullied as kids for being perceived as girly and gay for dancing. In that Strictly: The Professionals documentary thing that's on youtube, I thought all of them seemed a little too desperate to insist that chasing pussy was their reason for starting to dance (Aljaz, sweetie, you were 5. Sorry not buying it
) It's sad they feel they can't just say they love dancing.
They definitely could all be straight, and past issues with bullying making them oversell it a bit, but just as easily, that sort of background could keep someone in the closet.
And people can be closeted even if there seems no reason why they would be to anyone else. A guy I went to school with, (who just so happens to do ballroom competitively) was obviously, flamboyantly gay, but throughout high school he insisted he wasn't, even making up a girlfriend from another school. I naively believed him, because why would he lie to us, his friends, who would definitely be supportive? Well, he came out several years later. I can only assume some problem with his parents may have been the reason he didn't feel able to sooner.
edit: and I mean, look at Phillip Schofield, for christ's sake! As someone who'd only ever seen him in Dancing On Ice clips on youtube, imagine my astonishment when he came out and I discovered he had a wife and kids! I just assumed he was openly gay, because it was obvious.
Anywa, statistically speaking, I find it just a smidge hard to believe that of all the male Strictly pros there have been, that Ian, Matthew, Robin and Johannes are the only gay (or bi) ones. I took ballroom classes for a few years in my early teens, and of the 6 guys in the class, at least 3 of them were gay.