It only took one gym session with J Lo for the 48-year-old actor to lose his dad body all together.
Affleck made heads turn wearing a form-fitting, baby blue shirt while dropping his 9-year-old son Samuel off at swim lessons in Los Angeles ahead of the weekend.
The Batman star bulging biceps and chiseled chest could barely be contained in the plain t-shirt.
Causing everyone around him to blush, Affleck gave his child a hug goodbye and flexed his ripped muscles without even trying.
Wearing denim jeans and a trucker hat, J Lo's new man caused a heatwave all on his own during drop-off on Thursday.
Affleck proved he's back to being a leading heartthrob with every move he made, commanding attention with his perky pecks and large arm muscles.
Earlier this week, J Lo took her beau to her ex-fiancé Alex Rodriguez's stomping ground.
Paparazzi caught Affleck following the Love Don't Cost a Thing singer into a Miami gym which she used to frequent with the ex-Yankee.
J Lo flaunted her killer hourglass body in tight workout attire while Affleck decided to cover his.
According to reports, the rekindled duo didn't get too much working out in but that doesn't mean they didn't break a sweat.
Affleck and J Lo couldn't keep their hands off each other inside the gym and were allegedly seen kissing “in between sets,” reported Page Six.
"They stayed close to each other while working out and were hugging, being playful together," another source told Entertainment Tonight. “It was clear to everyone that they have intense chemistry and were having fun together.”
Affleck returned back to Los Angeles a few days ago and his first stop was at his ex-wife Jennifer Garner's home.
As for J Lo's exes, they are coming out of the woodworks -- just ask Diddy.