Lol, what a strange question!
Well if you say "once in a while" I presume you mean it's an occaisional thing and that you usually go for women? If so I'd say bi, maybe more straight than gay but not totally straight.
But really these are just labels, so what does it matter if you like to suck cock every once in a while?
I mean in classical times it was assumed that most men were sexually attracted to both men and women and that was normal. I think the need to categorise and to want to reject male-male feelings is to a big extent artificial.