That way you can get use to the feel of condoms and putting them on, which should help you feel more relaxed about using when having sex and less likely to use your erection. If you are going to use a condom under water it is important that you put the condom on before you get into the water, Also, if the water contains chemicals such as chlorine, or additives such as soap, bath oil or bubble bath then this may affect the latex. It will depend on which country you are in, but in the UK and USA anyone can buy condoms from chemists and supermarkets. Condoms are often available from vending machines in public toilets. In some countries condoms are available free or at low-cost from clinics.
Spermicides are available in a variety of formats such as creams, jelly, or foam.
They work by killing the sperm. It is important to remember they are not an effective form of protection against pregnancy or STIs when used on their own. Spermicides are inserted into the vagina before having sex. Some spermicides only offer protection for a short period of time e.g. hour, others may work for longer. It is important to check this before using the spermicide.