A heterosexual male who performs a majority of the household chores even though he has a live-in girlfriend or is married. Most likely pussy-whipped, he will readily take slave-like commands from his girlfriend or wife. See definition #3 for Mangina.
"Look at him, he's doing the laundry, making the beds, cooking dinner, and he's even vacuumed the entire house!"
"Yeah, he's a domestisexual."
"She orders him around like her own personal house-slave."
"Right! He's a domestisexual now".