I'm laughing, but feel bad in a way

Okay so my boyfriend and I have known each other since 2012 I think it is, we've graduated high school in 2016, and now we are dating for a little over 4 months. But there's been times when we're talking on the phone either while he's driving home from work or before going to bed and thing come up in our conversations and I cause him to have a boner but i cant do anything to help him, since he doesnt want to do anything until he gets himself a thing of condoms for our first time. But I feel like I should help him out in his situation that I cause him to have but not able to. I just fell really bad that I cant help him