Kitten is nursing on me I think

So my 6 week old kitten has been doing this thing where he starts purring and putting his body all over my face then he started kneeding on my chest and finds a fold in my shirt and starts sucking on it for about 5 minutes and then starts licking my face. Is this bad. Should I stop him? I know nursing is not a bad behavior but I'm not really sure.

completely normal. my 7 month old still does it although he prefers an earlobe or my hand. some cats do it when they are taken from their mothers too young. they are just comforting themselves. it's really nothing to worry about. some cats do it well into adulthood..