Can only get hard when physical w wife

I’m 46m, overweight but healthy, I wonder if others are like me – I have no problem getting hard when I’m having sex w my wife, but erections are very rare outside that – even when checking out pretty women irl or online. Get some morning wood regularly. But otherwise I need to touch my wifes body to get hard. A bit disappointed it takes longer to get hard and never happens spontaneously or even with visual triggers – looks like I really need touch. Is that common?