Romantic chemistry refers to a strong and intense connection between two people, often characterized by physical attraction, emotional intimacy, and sexual tension. Full definition
Besides the fact that you'll already know someone, you may even have romantic chemistry with him! (cupid.com)
Is there really such a thing as romantic chemistry? (datingadvice.com)
On a first date, you are aiming to see if there is sufficient in - person romantic chemistry and attraction to warrant a second date and possibly more. (datingadvice.com)