I'm not sure if I'm bi

Noira

So I'm really really turned on by breasts. Like even if i watch porn, i focus more on the woman than the man. I had no experience with girls, but i really want to kiss one and play with their boobs (sorry very tmi). But like i have no desire to have sex with one. The idea doesn't turn me on at all and i only want to have sex with men. I'm very confused whether I'm straight or whether this makes me bi?