Apparently the only thing with any real evidence behind it is semen but not swallowing it, but having it erm up there, due to the prostaglandins present (which is what is in the pessaries they give you to induce before they proceed to syntocinin drip)
I'm sure it is in far less quantities but face it it can't "hurt" unless you've been told not to (probably only placenta praevia or fear of placental abruption in which case you would know)
People will have various ideas about what worked for them and it may just be that it was their time or that it worked for them but not you.
Its true it will come when it comes and that if it doesn't want to come, nothing will make it come (I speak from experience as someone who had 17 hours on a synto drip and made it to a massive 1cm dilated
)
Sitting about on the sofa apparently is no good and bouncing on a ball is, but I think that may be more about optimal foetal positioning than actual induction of labour. You could argue that you should make yourself as comfy and relaxed as possible so that's your call.
Things like curry and pineapple are possibly as much urban myth as anything, and 150 million plus women may say "it worked for me" which it may have, but its hard to measure as many of them were probably 39+ weeks and about to go...nobody really knows but it can't hurt as long as you like eating either.
Cod liver oil is not recommended these days as if you are about to go, it can give both you and the baby the shits which may or may not induce labour but apparently can increase the risk of meconium in the water which can be either a distressed baby, a C-section, or a baby who has inhaled meconium which is no laughing matter, so ignore your well meaning spinster aunt if she offers this up like mine did.
A jolly good cervical pounding with the very thing that got you into this mess in the first place, is only fair, if you are up for it
Of course I tried that and wish I damn well hadn't bothered. But go for it. Its the blardy least he could do. The barstarding, non pregnant prick.