Question: Gender

Francesca
I wanted some input, I personally do not want to know the sex of my baby when we go in for our next appointment, my boyfriend does. 
I am more than fine with him knowing and have explained he just needs to keep it to himself. I do not want him telling others as I am sure once the babyshower comes around someone will slip with a gender color present and give it away.
Has anyone else gone through this? Where one partner knows the gender and the other doesn't? And if so did it cause any issues?