How can guys lift and carry girls?

I see guys easily carrying girls(that weighs about 110 Ibs and over) and I always wonder how they are able to do it. I can never lift a person lol. I know guys are stronger than us girls but it still seems impossible to me. are they actually having difficulty doing that and not showing it? lol.

i also wonder; why do guys like to do that? thx.
How can guys lift and carry girls?
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