Nipples

So.. Every time I go over to my friend and we change she show me her nipples saying their to big and I got used showing my nipples to my friends since we were growing and i just feel like I have weird nipples. Cause one time I was making out with my boyfriend and he said “What kind of nipples do you have ?” And totally ruined the moment and he is a like “do you have pepperoni nipples?” And I laughed cause it sounded funny but, I’m so confused on what’s the correct size or are “pepperoni nipples” unattractive? I feel so insecure.