Posing nude for a magazine cover? It’s not just for twentysomethings, says Sofía Vergara, who bares all on Women’s Healththis month — and at the “ripe” age of 45.

Vergara, whose birthday was in July, goes commando for Women’s Health‘s September “Naked Issue,” saying in an interview with the magazine that times have changed when it comes to how women are depicted in the media.

“Here’s a woman, 45, being able to show her body,” says Vergara, star of Modern Family and TV’s highest-paid actress. “It’s not like before, when it was just young girls who would make the cover of a magazine.”

The Colombian-born Vergara may be an international sex symbol but she is well aware she’s no spring chicken. Stop putting me in naked things, she jokingly ordered her agent. “Let me age with dignity!”

“People say, ‘Oh, you look like you’re in your twenties.’ Well, it’s not true,” she says.

“Our skin is different. I had never thought of the word ‘pore,’ then I’m like, ‘(Shoot!) What do I do with these?’ ”

Now that she’s turned 45, she knows she can’t be “perfect,” even if she wanted to.

“It’s not that you hate (being older), or that you’re upset about it, but it is our reality. We’re changing,” she says. “I see it happening to me. I want to look my age, but I want to look great. I think if you are obsessed with this ‘I want to look younger’ thing, you’re going to go crazy.”

This is Vergara’s second time in the buff this year; the first was for a shower scene with actor Karl Urban in the upcoming spy thriller Bent. Her latest foray caused her husband of almost two years, Joe Manganiello, to wonder if this was going to be a regular thing.

“Joe’s like, ‘(Hell), you’re going to be naked in everything now? Why?'” says Vergara, throwing her back in laughter.

Vergara also talks about other things in the interview, including her “gigantic boobs” (she’s had them since she was 13); her diet (Thursdays are cheat days); her workout routine (three or four times a week with a trainer); and her underwear line, EBY, launching this month (10% of sales go toward micro-financing loans for women looking to start small businesses around the world).

“I love underwear! I won’t sell something I don’t believe in. It has to be good, and it has to be something I really use.”