This happened back in college. I had been going out with my girlfriend for a little under a month and we were getting more and more intimate. We discussed that it was about time to buy some condoms. So I went to the store and looked at their selection of condoms. Instead of getting the 3 pack, I bought a 24 count box since it was cheaper per condom. I come back to my girlfriend's apartment and showed her the box. She asked what are we going to do with this many condoms, that's too much. So I went back to the store. I was a broke college student, so I was too cheap to just keep the box somewhere or throw it away. Instead, I swallowed my pride and went to return the box. When I went to do the return, there was a lady doing the returns as well as a couple of ladies around. The return lady asked why I was returning it and I said that I didn't need it anymore. I hear snickers from all the ladies, while inside I was dying of embarrassment. After getting my money back, I got out of there as fast as I could and went to buy the 3 pack. I told my girlfriend what happened and we both got a good laugh out of that.

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TL;DR: I just started a relationship with my girlfriend. I went to the store to buy condoms. Instead of buying a 3 pack, I bought a 24 count box. Girlfriend thought it was too much. Was too cheap to throw the box away, so I returned the box to the store. Got snickered by all the ladies at the return counter.