"I need to find that 18-year-old in me again, who was way more adventurous when it came to kissing boys," she told the U.K.'s Sunday Times. "I would love nothing more than to have a good, honest make out sesh, but I find it really hard because I'm a mom."
Hudson split from Black Crowes frontman Chris Robinson in 2006, but their marriage produced their 4-year-old son Ryder.
"Any guy I ever meet is always going to come second to my son," the Fool's Gold star, 28, told the paper. "And you get to weed out the boys from the men. You definitely know which ones are the boys."
So far, it seems Owen Wilson has made the cut. The duo – who split last summer but are now back on-again – were even spotted on an Easter-day bike ride with Ryder.
"I'm a mom and that's my first priority," said Hudson. "I can't wait to have more. I'm at that place when I'm ready to have another one and Chris and I are not together. I'm like, 'Oh no! Uh-oh! I'm ready.' "