Riding my BF

Passion

So I’ve been with my bf for about a year now and have never rode his dick. He always gets soft whenever I’m on top. He says it’s bc of the pressure on his abdominal. Has anyone ever heard of this ? If so what are some ways around it ? I really want to show him what I’m capable of. Part of me thinks he has this issue bc he likes to be in control. He’s always on top or we do doggy style. Help plz ... our anniversary is next month and I’d love for him to be able to lay back while i do all the work, this time.