Strange behaviour?

[Mummatoh]

Apologies if this sounds stupid. My 15mo boy puts his index finger in his mouth after touching things. I just find it a bit unusual. He will touch the cat and then put his finger in his mouth, and other materials. He also has to squash things on his plate before eating them (peas, blueberries). Am i right to think this is odd? First child so not sure :-)

Not come across that one before OP.

Hopefully someone will be along soon with experience.

Not come across this specifically but they're still very much in that baby phase of sensory development and sensory seeking at this age is perfectly normal I'd say. He's also at that stage where he's discovering all sorts of 'rules' about how things work eg 'if I throw that it will hit the ground' 'if I pour that water will fall out' ... Perhaps he just discovered that some things have a taste after you touch them and is testing the theory. I wouldn't be concerned especially if he's developmentally on track