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Matthew McConaughey was feeling way more than "alright, alright, alright" during a dream one night ... revealing he ejaculated in his sleep ... and it led him to his wife, Camila Alves !

The actor made his emission admission in his “Lyrics of Living” newsletter Friday, according to Us Weekly ... explaining he had laid his head down on the pillow one night and dreamt about his 88th birthday, where he was surrounded by 22 women and 88 children -- having fathered one child for each year of his life. Gallery Launch Gallery Getty

McConaughey claims the women all knew each other well ... and they all shared happy times and good memories -- no green-eyed monster jealously rearing its ugly head at the affair.

He then writes, "They all gathered around me on the porch fo

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