I don't really think that you can. I've tried to get in a deep relationship with people and you just can't woohoo. : (
yes, you can have two sims that are in love woohoo by having both of them relax on a double bed and then chose the option that says "woohoo"
Once you reach level 70 in magic, use the Expelliarmus spell on Dumbledore and you will shout woohoo.
yes you can, but its blurred out Answer. first you get them to fall in love 100%, in some games they may ask you do you want to have a baby [?] and you say yes or no. some ganes they dont aloud you...
you need to have two sims that are in love, then have them both relax in a double bed, and then select "woohoo"