Kanye West wishes Kim Kardashian West ''could be pregnant all year long.''

The 38-year-old rapper is reportedly obsessed with his wife's growing curves and thinks she looks sexier than ever.

A source close to the couple, who are expecting a baby boy in December and already have two-year-old daughter North, told gossip website HollywoodLife.com: ''Kanye wishes Kim could be pregnant all year long. They have the most adventurous and crazy sex when she's pregnant.

''He loves bumping and grinding with Kim when she's pregnant.

''He loves caressing her pregnant body with oils. He loves kissing her lips.''

The 'New Slaves' hitmaker previously admitted he thinks the brunette beauty is ''the most beautiful woman of all time.''

Earlier this year, the 'Keeping Up with the Kardashians' star, 34, confessed she and the rapper were having ''sex 500 times a day'' in a desperate bid to conceive another baby.

She added: ''It's, like, so frustrating. I'm exhausted and I think I'm just making this all about the wrong things. Like, I'm forcing it, so we just need relax. We just need to not stress it, not plan so much, and just go with the flow.''