If it was a friend of the opposite sex I would definitely offer to engage in platonic tickle play. I recognize that we as people and society in general have placed sexual overtones on the act of tickling (especially when the tickling is a planned session between opposite sex participants)...But there doesn't have to be any sexual behavior at all. The intimacy of trust (if doing sessions) and the intimacy and proximity of two people( even if just playfully tickling), gets looked upon as sexual intimacy and proximity (which is not an automatic link). I have tickled women with the idea of just being platonic play partners (even using bondage to enhance their ticklishness) and no 'boundaries' were ever crossed ( and the women came back for more sessions) . I have also been involved in tickle play situations with one girlfriend in particular who wanted the bondage and tickling as a arousing bridge to 'other activities'.
If there was a female lee/switch who wanted the stress relieving aspect of a tickle session, I would have no hesitation to accommodate them.