Yes, but you have to have unprotected sex first!!!
Yes, you can avoid it. But you miss out on the achievements and it is a highly recommended experience.
make a villager love you then buy a ring. (try to buy the eternal love ring) marry him/her (you gotta have a house) then go to the house and press "A" on the poster thing that's near the door (the...
Use expression come back to my place and lead member of opposite sex to a bed.Don't use a condom