When you want to take steps toward preventing pregnancy, and when you want to prevent transmission of STDs.
If you use condoms, then water based creams should be used. Oil based can cause harm to the latex used in condoms.
Condoms should only ever be used once. For more information on the correct use of condoms, please see the related question.
Condoms usually have a use by date printed on the back of the wrapper. Condoms are usually good for a year or two if they are stored properly. Condoms should not be stored in wallets.
You should wait about a month until you have sex afterwards and unless you want to get pregnant again, yes, use condoms. If you plan another child wait about 4 months to try to get pregnant.
If they are practicing Catholics they could not use condoms.
You don't, because it DOESN'T prevent pregnancy! You should be using condoms!
* You should avoid sexual intercourse * If you insist on have sexual intercourse, use protections such as condoms or "the pill"
Anyone, gay or straight, should practice safe sex, whether that be using condoms, or practicing monogamy.
There is no use for withdrawal when using condoms. If you are afraid of the condom being burst then use a spermicide along with condoms. No I have my beautiful baby boy because of the failure of this exact thing...