However, please do always insist on them treating you with respect. If they push or jump or barge, do not give them any food.
Never rub them on the top or front of their heads, this can develop into butting games, which later on become less like games and more like bullying. If you want to give them some fuss, behind the ears and under the chin are the places that are safe to fondle.
Wethers are generally less dangerous than rams, but an undisciplined full-grown wether who thinks you should give him a treat can, nonetheless, be dangerous, and we have to tell three or four people every year to send their pet off to the abattoir.