Sexing the opposite sex

Bridget

My guy is great to me. He is not big in size. Somewhat small. However I occasionally have sexual thoughts with women. Strange enough I am not attracted to women in real life nor seek them but whenever and only when I masterbate, I get off visualizing a woman eating me, rubbing me, scissoring, fucking, kissing me etc. Anyone else like that? I just need understanding in what’s going on.