my man thinks he can't get the job done. 🙄

Ka
Soo my man tells me the other day he feels like he can't get me to orgasm despite the fact that I told him he absolutely can. Multiple times. This man is amazing at what he does. I find myself unable to walk most of the time. Lol 😂 anyways he recently has been asking about getting a vibrator to "help" him out. But I think it's because he enjoys watching me "do" me. He'll tell me "show me what you like. I have no clue." 😏  when I know for a fact he very well knows. Lol. Now I wouldn't say no to the idea but I don't even know where or what would be best to get starting out. I'd like suggestions of what to look for and what to stay away from. Any idea about these online stores? We don't get much time to run to actual shops. 😑 Are they really discrete? We have some nosey people around us. Lol 
Thanks in advance! 😊