That is one invitation to get my mind going. All of this is meant to be harsh to a point where even any fairly well trained painslut might consider this to be a punishment. So... Let's see.
Toilet play. Only applies as a punishment if you hate it really. If you love it, it is not much of a punishment but here we go:
1.1 Go to your toilet and lick the seat, drag your tongue one there one time all around.
1.2 Go to your toilet and lick the bowl, drag your tongue one there one time all around.
1.3 Go to your toilet and get your head in there. Go flush, get your hair and face wet with toilet water.
1.4 do 1.3 again but take a piss first.
1.5 Be a good bitch and drink out of the toilet.
1.6 do 1.5 again but take a piss first and don't flush.
1.7 do 1.5 again but take a dump first.
Spanking
2.1 Go start easy. Fetch a brush and go spank your cunt. Go aim for your clit. Go hit hard. Go hurt yourself.
2.2 Just go on, go hit the same spot again and again and again.
2.3 It hurts and you want to stop? Go on. Keep going.
2.4 You tremble with every hit? Still all the same, go on.
2.5 You finally start to cry cus it is this bad? Good. But still no time for you to stop.
2.6 If get to the point where you physically cant hurt your cunt more cus your body simply refuses or you are so exhausted, that you are half way passed out, it is finally time for a break.
3.1 Go fetch a belt with a heavy belt buckle and go for your ass. Pretty much go do 2.1 to 2.6 but go for the belt buckle and your ass instead of the brush and your cunt.
Hot sauce
4.1 Let's get some burning going. Go fetch the hottest hot sauce you can find. If you do not have any, icy hot works to but tends to be way softer than the harsh stuff. Go rub a bit of it on your clit. Can you stand it?
4.2 Let's go use it as lube for your cunt and then your ass. Let's make you regret asking for this. Cover your biggest toy with hot sauce and shove it up your cunt and fuck yourself like this for 15 minutes.
4.3 Switch to your asshole. Let's burn it some too. Same as 4.2 but with your ass.
I refrained from going all out here. No burnings, no needles or pins, no cuts, no lasting damage to your body or social life. If you want me to go all out, go send me proof that you did at least one full set of the above and I will write you some more.
Happy hurting
Meorin