@Mame,
Years ago, my young son and his girlfriend who had been dating for some months came to me and said they wanted to take their relationship a step further, but she didn't want to become pregnant and they asked for my advise.
I told them, that was not the sort of thing to ask their father and future father-in-law, and I offered to drive them the family planning clinic, but when we got there, the local council workers had dug up the front footpath and the clinic had a sign above the door which said; "Use the rear entrance", to which the young girlfriend said to my son; "Yeh, that should do the trick, alright dad, drive us home." SAFE SEX.