My son is 20,living away from home in his 2nd year at university. He’s never been the slimmest child growing up, mainly on the sligihtly chubby side with a few periods of being a bit bigger and a bit smaller but nothing ridiculous. Since going to uni however he has put on a lot of weight. Managed to get him to weigh himself when he was home last week and he was nearly 18stone and is 6ft tall. I know hes an adult (technically) now but im concerned about his weight and whilst it’s probably not dangerous now i dont want him to keep putting more weight on. Should i talk to him about it- in the last he has been quite sensitive about it or leave him to make his own observations and descisions in his own time?