I agree.  I grew up tickling my Mother’s, Grandmother’s, Cousin’s and Aunt’s feet, and it never affected me in such a way that I ever felt any sexual attraction to any of them.  I grew up normally, had a few Girlfriends along the way, eventually got married, and have been so ever since.  I really don’t think you have anything to worry about, so I wouldn’t rush right out to see an Analyst or anything.