Jealous male Leads are so cute!

I love it when cute or handsome male leads get jealous! In any rom-com, the ML will get extremely jealous due to a love rival or something. I loved Gu Jun Pyo's jealousy in Boys over Flowers, Feng Teng's jealousy in Boss and Me, Chi Cha So's jealousy in Flower boy ramen shop (These are my top 3). Does anyone else feel the same when the ML gets jealous over the FL or competes against several love rivals to get her attention?