Fraternal Twins affection

I have to ask this because my husband is convinced that if our 15 month old twin boys are too affectionate with each other they might end up being gay. The other day, the boys were playing and they just happen to “kiss” each other on the mouth. Husband put a stop to it right away and I told him not to make them believe they did something wrong, they are babies afterall. So what’s your take?