(literally) While on a bed.
Reading in bed and breakfasting in bed are two of my three favorite activities.
(idiomatic) In terms of sexual prowess.
She wasn't kind or smart, attractive or even funny. Her only redeeming feature was that she was fantastic in bed.
A card or phone call, a cuddle in bed, but none of the grand family reunions of years past. Source: Internet
Additionally, The Weeknd joined “SNL’s” Kenan Thompson and Chris Redd for a hilarious musical sketch about men sleeping “On the Couch” instead of in bed with their lovers. Source: Internet
After about three weeks in a hospital, the man was home in his New York apartment but still so weak that sitting up in bed took some persuading. Source: Internet
After a solo recital in Paris on 21 February 1842, he wrote to Grzymała: "I have to lie in bed all day long, my mouth and tonsils are aching so much." Source: Internet
After a few weeks in bed, he hit on a kind of internal back-and-forth, which became key to his survival. Source: Internet
And she revealed that although it is third time round when it comes to marriage, she still believes in true love, earlier this year sharing a photo of her and Tom in an intimate snap in bed online. Source: Internet