Interesting perspective. I have another.
The desire for another person, be it the teacher or the neighbor, is a vocalization of pelvic or vital force, not the heart.
The vocalization from the heart is the vocalization of the spirit and therefore interconnected to svadharma, one’s purpose for being here. Very different (to me) than a fantasy or crush.
If the feeling is desire, then yes I would agree wholeheartedly. If the feeling is indeed love, then I still feel it comes from the heart. Either way the emotion is a reflection that has arisen through the practice.
I think its important for practioners to realise that during our yoga practice (asanas, pranayama, meditation…) many things may surface. Its a natural part of the practice. I’ve seen students get up off the mat filled with anger… and for no logical reason. I’ve had this happen to myself too, until a teacher helped me see that this is not connected to anything outside of ourselves… the practice has stimulated a release and we need to just observe and let it go with the breath.
Its easy to forget that we are doing so much more than just stretching when we practice yoga.