My bp was super head shy at first, but after lots of gentle touching over the last year, he's totally used to it at this point. I gently touch the top of his head and lift his head with my finger when handling. I figured it would be good to get him used to it in case I ever need to examine him for infections or give him any kind of medication. If he's used to the head touching, the whole process becomes less stressful and foreign.
Also, ball python 'headboobs' are squishy and adorable to poke.