Yes, my female BP is very ticklish. If i rub her anywhere on the lower sides or anywhere on her belly, she reacts strongly. I find it very funny. My other snakes (1 northern pine snake, 1 boa) don't react at all on the lower sides, but they do react slightly (and sometimes not at all) to the same thing on the belly.

Trying to tickle the boa can get me in trouble with him...