No, most do not. Boxers are a type of underwear, so saying a guy wears 'boxers under his underwear' would be the same as saying a guy wears 'underwear under his underwear'.
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Any type of underwear that are in the marketplace are safe to wear. It is really a personal preference for the different styles.
Some modelling and clothing stores do have policies like that, espeically if revealing the underwear is part of the job description.
Russet is the most popular type of potato
About 64% are wearing Hanes
According to ChaCha the most popular type of skittle is the purple.
The type of music that is most popular is the music that is most popular!
What type of underwear does christina Aguilera were
LCD is the most popular type of flat panel monitor.
The golden Labrador retriever is the most popular.