Yes if they are in love
On the Sims 1 you have to kiss 10 times. On the Sims 2 and 3 you need a boy and Sim and a girl Sim "Relax" and bed. Then what I do is make them cuddle, then kiss, then makeout, then pick "Try for Baby."
Well first you click on your Sims then push "KISS" then "MAKE OUT" oh and this is PC version
Only to a family member in a 'family kiss'
you can only kiss the sandbuddy but you can marry a sim
Yes they can.
you have to get to know the sim you are wanting to kiss, and you will be able to kiss them faster if you have the "great kisser" trait.
No. Actually, yes you can. just make them married in create a sim, or make them flirt and kiss whenever there relationship level is high enough!
Relationships and interactions are different in the sims 3,this means that your sims can't just start making out with each other even if they are in love. you have to build up the mood. keep on doing different romantic interactions and the "make out" option will be there, you just have to work for it.
It's instant.. I think if you kiss on free play you get a baby.. but if you have children already you wont get one.. I'm not to sure on story play, I'm finding that out at the moment..
first u have to get 100 relationship points
to make a Sim not related to each other what you do is you make the family but instead of pressing spouse or sibling you push roomie of your Sim