The brunette beauty plays Megan Draper in 'Mad Men' and insists there is nothing raunchy about her intimate moments with her on-screen husband because the scenes are so "choreographed".
She said: "It's pretty funny really, it's a matter of choreography."
The 33-year-old actress says appearing in the show has taught her a lot about fashion and she is very envious of her alter ego's wardrobe.
She said: "There's tonnes of stuff I want to steal from Megan's wardrobe. I even love the nightgowns and robes she wears around the house.
"I've learned a lot about fashion from Megan; she wears lots of patterns and silhouettes that I wouldn't have necessarily tried for fear they'd be too feminine.
"My own taste veers towards something where that feminine aesthetic is tempered by an edgier feel; Jason Wu and L'Wren Scott have got it just right."
'Mad Men' is about to end after seven seasons and Jessica thinks it is right to go out on a high.
She told Britain's Glamour magazine: "'Mad Men' is one of the best jobs you can have, but we're well aware that if it hadn't been so good, it wouldn't be so hard to leave - it's very bittersweet."