Hi, Doctor I Am 24, I Would Like To Ask

Hi, Doctor

I am 24, I would like to ask that having sex with my wife, does it reduces my penis size? Because I noticed in in first year of marriage, I was well thick and long. Now, its thin its been only been 1 and half year I got married. My frequency is of 3 _4 months for getting physical , as we are at distant. I am worried, why its loosing up. Help me to develop more better manhood.