Wear a pair of panties for 24 hours. During these 24 hours you have to cum 3 times in these panties. And you are not allowed to take them of at all. So if you have to pee you must do it through your panties. When the 24 hours are over lick the panties clean.

For the next 48 hours you will wear the same pair of panties. Roll a 1D6 dice and that's the number of times you must cum in your panties alternating front and back. When you next shower after the 48 hours are up you must wear them on your face, enjoying the smell of pee and cum.

Put on panties, cum in them, us the cum as lube to finger yourself, and wear the panties for an hour

Cum in your panties and wedgie yourself with them as high as you can. Then go to the store for 15 min with them still wegied. When you get home take your panties off and put them in your mouth for 30 min

For the next 3 days wear a pair of panties. Cum in them every night before going to sleep. You can't change them for the duration of the dare.

You are to wear the same pair of underwear for a week and have to cum into them twice per day. You may only remove them for showers and going to the toilet. At the end of the week, sleep with them on your head

For 48h, toss a coin every 5 hours.
Heads : rub your panties and cum in them
Tails : rub your panties but don't cum
Keep your panties for the whole 48h.
Put your panties in your mouth for the last hour.

Wear your smallest pair of panties and give yourself a wedgie. Drive to a public park with an open bathroom. Take the panties off and cum inside them. Put the panties in your mouth and cover your face with your mask. Drive home and stay like this for 2 hours.

You have to wear the same underwear for the next 48 hours, and you have to cum in them at least 3 times per day

For the next 3 days wear a pair of panties and cum in them every time you want to take them off (for example to use the toilet or shower).
If you don't cum you are not allowed to take them off.

cum in a pair of panties and stuff them in your mouth, drive somewhere at least 15 minute away and go to its bathroom, take the panties out of your mouth, cum in them again and leave with them stuffed in your mouth

For the next 48 hours, every time you want to take your boxers off to use a toilet, cum in them first. If you don't cum you can't take your boxers off and have to pee through them.

Put on a pair of silk or satin panties and go to a public toilet. Strip to your panties and turn them around then cum in them. Now unlock the door, take the panties off and put them back on the right way around, get dressed and leave. You can only change panties after you've cum in the front and back again.

Get a pair of panties and cum on the inside of the back of them. Put the panties on while the cum is still wet. Do not take them off until the cum as dried completely.

Wear and cum in a pair of panties 4 times. Take as long as you like but they may not come off until you finish, not even to use the bathroom. When you are done put them on over your head