If you put lemons and limes in water, lemons will float and limes will sink. Why? Because although lemons are usually bigger in size, making them typically heavier, it all comes down to density.
Lemons have around the same density as water (0.99) and they have pores all over their rind, resulting in tiny air pockets on their surface causing them to float. Limes, on the other hand, are denser than water so naturally they sink.

At first, a semla was simply a bun, eaten soaked in hot milk (known as hetvägg). At some point Swedes grew tired of the strict observance of Lent, added cream and almond paste to the mix and started eating semla every Tuesday between Shrove Tuesday and Easter.

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⠀⠀⢀⣾⣿⣿⣿⣷⣮⣽⣾⣿⣥⣴⣿⣿⡿⢂⠔⢚⡿⢿⣿⣦⣴⣾⠸⣼⡿
⠀⢀⡞⠁⠙⠻⠿⠟⠉⠀⠛⢹⣿⣿⣿⣿⣿⣌⢤⣼⣿⣾⣿⡟⠉
⠀⣾⣷⣶⠇⠀⠀⣤⣄⣀⡀⠈⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇
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⠀⠀ ⠀⠀⠀⠀⠀⢸⣿⣿⣷⣶⣮⣭⣽⣿⣿⣿⣿⣿⣿⣿⠇
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+rep bra nickname

don't lie partyboy.. he has terrible aim.

+rep very strong good aim hard shoot