No, it isn't. Indeed, kissing can be part of your sex life. And then it is normal and natural to kiss a woman on all parts of her body, which only she wishes to show you.
But at the same time, a kiss can be an act of friendship, and no blueness is present here. Now imagine - I score a goal into the opponent's goal, which will bring several million to your personal pocket. You will be ready to kiss heaven and earth and myself for such a gift. But such love will have nothing to do with sex.
And - yes, I forgot to add. The footballers themselves are not only brightly heterosexual, but they also have such wives - yum-yum, candy, and not wives.
It's not entirely clear why you are so interested in someone else's sexual orientation, but figs with him. Based on this logic, it turns out that if a person strokes a cat, dog or other animal, is he a latent or non-latent zoophile? And, there is a tradition of kissing the dead on the forehead. As Borschevsky once said: "At the same time does not mean in the investigation." A hug and a kiss, in general, is a way for people to show intimacy and more often not intimate, but spiritual intimacy. Hugs are more often a symbol of a person's support and trust.