We absolutely can!
I was with my ex for 25 years. He was VERY even-keeled. (HAD to be with all the chaos I brought to the table, lol.) I never cheated (till very end), but I did have some crazy infatuations. Which all took place in my very vivid imagination… Good thing, as they were pretty whacked choices.

Been living with BF a bit over 5 years. He is not even-keeled. I'm nuts about him even though he drives me nuts sometimes. 'Cause I do too. I don't think about anyone else real or imagined now.

Very different experiences.