Yes ... it can be either sex. Both men and women can sew.
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Second opinion:
Seamstress is for female; tailor is for male.
There are some archaic terms for a man who sews: seamster, sewer, sempster, sartor, modiste
But you'll rarely these terms used nowadays, depending on local dialects. Tailor is now the generally preferred term.
A seamstress is a woman who makes clothes. Seamstress is the female definition of tailor. A lot of seamstresses make male clothes, too.
Traditionally you would call them a Tailor. The female equivalent of this is a seamstress or dressmaker.
itx seamstress
Tailor"
It is same barber. Just as opposite gender of soldier is soldier. When a traditionally a male profession would not have a female equivalent similarly seamstress will not have a male equivalent.
a seamstress
a seamstress is a female who sews
A woman who sows is a "sower."A woman who sews is a "seamstress."
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sexuality is not binary (male/female) it is a wide continuous spectrum from male (psyche) with male parts (anatomy) over male with female parts to female with male parts and female with female parts and even male & female psyches with male and female anatomy!
male