Raven exhibits similar behaviour, but only when I'm wearing clothes with a little ribbon bow (like my nightshirt) on them. He suckles for several minutes at a time and eventually settles down to snuggle. It's fine when I'm awake (he's actually doing it now, sitting on the desk between me and the keyboard!) but gets a bit wearing at 3.00am because he's not the quietest sucker and has a very deep purr...

Try dabbing a little citrus oil on the things you don't want him to suckle, or use a citrus scented body spray/moisturiser. When you remove him from your person, put him in a place where he can suckle - soft toys or woolly blankets are favourites - so he knows that he can still be safe and loved, just not all over you. He should grow out of it, but if he feels insecure and pressured, he may go back to it. Get him used to his own little space and he will always have a 'happy place' where he is comfy.

LTS