Are humans becoming less ticklish because of evolution?

Question

I just found out that when a person is being tickled, their mind activates a primeval survival technique to warn the person that something is "crawling" on them. When someone tickles himself or herself, the brain is expecting the feeling and does not react. Why then do only some humans react to being tickled? Are we losing this instinct through evolution?

Answer 1

Now, being ticklish has very little impact on survival, since the odds of dying from an otherwise undetected bug are low.  As a result, there is little evolutionary pressure to keep the trait, but there is also no pressure against the trait.  After all, it is just as rare to be deprived of the ability to reproduce through a tickling-related  incident.  As a result, ticklishness will probably remain unchanged.