Do i loose calories like this?Need opinion.?

I'm a guy and will turn 35 in few months.I'm single.I'm very skinny and weigh just 48 kgs.I try to eat more but still can't get fat.But the thing really concerns me now is that i have a habit of thinking every night when i'm in the bed and i get excited.It has become my addiction.I've been doing it for last 20yrs.I try not think about but just can't help it.I wanna know do i loose my calories this way if i think of everyday.Is this the reason i don't gain weight?