Who has a single male friend they’ve been trying to set up on a date? (Single guy… shame)How old is this male friend? Don’t bother trying to set them up anymore! New relationship data has come to light suggesting that the odds of a man committing to some sort of long term relationships starts declining around the age of 37/38. Experts say the data reflects broader social changes, including delayed marriage, increased career focus, and changing expectations around partnerships.