labor of love

first love

The thing, place, or activity of which one is fondest; one's most fundamental interest or attachment.

for the love of the game

Doing something for one's own enjoyment or other intrinsic desire to do so; not for other reasons such as money or other ulterior motives.

labour the point

To continue to discuss or explain something excessively or repetitively to the point that it may bore or annoy the listener.

love at first sight

an instantaneous attraction

love away

To resolve conflicts and emotional pain through love and intimacy.

love buzz

The feeling of love, butterflies in your stomach.

love goggles

Blindness to criticism or objectivity directed at a person with whom one is in love.

love muscle

the heart