Ashton going to the gym is like watching the birth of jesus.
He would be all hot and sweaty lifting weights and doing shit they do at gym's.
He would love to bring you with him 'cause he would love to watch you run whilst your boobs where bouncing. Watching you run in yoga pants was the biggest turn. For him, you going to the gym with him is the next best thing he think of doing with you.
Lets just say after the gym things got pretty heated.
He also likes to show off a little more when you're with him,You know run a little longer, lift a little more ect.
So basically going to the gym with ashton would be a little show for you and him and the best part is when yall get home and have the final act.