Katie Price believes sex should be ''spontaneous'' and has urged couples not to censor their love lives.

The former glamour model insists people shouldn't limit themselves to lovemaking in the bedroom and should get frisky wherever the mood takes them.

Katie - who once starred in a sex tape with ex-boyfriend Dane Bowers - said: ''One thing that ruins sex is that people always think about it when you go to bed at night, you're in bed and that's when you have sex. I hate that as well. I think bed is for sleeping, not just for sex.

''So be spontaneous: go outside or do it somewhere different in the house. So many couples think, 'OK we're in bed, now we can have sex.' ''

Katie is currently pregnant with her fifth child, her second with estranged husband Kieran Hayler, and accepts you can't be sexually adventurous when you're pregnant because the bump can make things awkward.

Speaking during her Fubar Radio show, she added: ''When you've got a bump, you can't be as adventurous - well you certainly don't want to do it in front of the mirror, for one. And you can't because the bump gets in the way.''

Despite giving birth four times to Harvey, 12, Junior, nine, Princess Tiaamii, seven, and 11-month-old Jett, Katie never realised why sex can help to bring on labour.

The 36-year-old beauty said: ''I only just found this out myself. They say that if your baby's late or you want to bring on the labour, they say go and have sex.

''But it's not the sex that brings on the labour, it's the man's sperm. I always thought, 'Is it the sex? The bang, bang, bang, breaking it.' And it's not, it's the actual sperm. It gives off a hormone. That's what triggers it off.''