im underage and my coworker is older then me

Soo im 17 and my co worker is around his 30’s assume i havent asked for his age but you can obviously tell when someone is way older. Hes a nice and cool guy ive told him my age before and ig he didnt care about it he always says hi gives me hugs well today he calls me over to the desk and he’s pretending like hes typing in something on the computer but he’s actually asking for my number and im jss like hmmm hes too old to be asking for my number and he knows im underage so im just questioning in my head why he would but i dont want to jump into conclusions and just gave him number what do yall think?