That is a great question.
I know from my own experience that love may not be only physical, but it is the first component that needs to be compatible between two people falling in love.
If the physical part doesn't feel comfortable then there might not be a chance to get to know a person on a deeper level.
As an example , years ago I was very interested in a young man and liked him , but I couldn't stand the way he smelled and I am not talking about bo, but more like his own scent. I just couldn't get past it and I realized this must be the genetic make up of his body.
I am wondering if he felt the same way, but it was too embarrassing to discuss it at the time.