My female BP is not head shy at all, and she'll let you pet her head whenever and she wouldn't pull back. My male BP, however, gets bothered when his head gets touched. I don't exactly know how I got my female to become not head shy, so I don't really know what to do. It isn't really that big of a concern to be whether the male is head shy or not, but it would be nice to not see him pull back quickly when I accidentally touch his head. So, what are some ways to get a BP to become less head shy, or not head shy at all?