Check the expiry date. You don’t want to use an expired condom that may break.
Open the packet carefully; don’t use your teeth as you don’t want to tear the condom
Hold the tip of the condom to remove any air and then roll it down to the base of the erect penis. Make sure the condom isn’t inside out before attempting to roll it on. If you do roll it on inside out there’s a possibility it could have some sexual fluids on it (like pre cum). The best thing to do here is to grab another one and start again.
Put some water-based lubricant on the outside of the condom. This will reduce the risk of the condom breaking and even increase pleasure. Try not to use oil-based lubricants such as Vaseline; these can sometimes cause the condom to break.
After ejaculation, make sure the penis is withdrawn while still erect. Make sure you hold onto the base of the condom while you’re withdrawing. You don’t want it to slip off.
Remove the condom, tie a knot in the end, wrap it in a tissue and put it in the bin.
Here’s a tip: If you are using sex toys, like dildos, it’s also a good idea to use condoms on these, as sexual fluids and STIs can be transmitted between partners if you are sharing.