Why can't men trim eyebrows? I get that plucking is wrong, but there are other means.
I don't know but my first guess is because it is something which women regularly do and men are forbidden from trying to look like women..
But wait... I found a link which says it is ok...
http://www.torah.org/advanced/weekly-halacha/5761/pinchas.htmlCUTTING HAIR - WHEN IS IT PERMITTED? WHEN IS IT PROHIBITED?
It is permitted to trim a mustache that interferes with eating(2).
It is permitted to pluck one's eyebrows or eyelashes(3).
Married women may cut hair that is protruding from their head covering(4).
It is permitted to comb one's hair even though some hair will get torn out while combing(5).
Nail cutting is permitted(6).
It is permitted to shave if one's employer insists upon it(7). But if one's job is not at stake, though he may be ridiculed, it is forbidden to shave(8).
A mourner who completed his mourning period during the Three Weeks, may take a haircut and a shave(9).
The prohibition of hair-cutting applies even to small children under the age of chinuch(10). Thus if an upsheren falls during the Three Weeks, it should either be moved up or postponed(11).
If absolutely necessary, some poskim permit taking a haircut or a shave on the evening and night of the 17th of Tammuz(12).
There are poskim who support the custom of those who shave on erev Shabbos(13), but this is not the custom today in most communities(14).
On the day of a baby's bris(15), the father, the sandek and the mohel may take a haircut (16).
FOOTNOTES:
1 Ta'anis 31b, quoted in Shulchan Aruch O.C. 554:25.
2 O.C. 551:13.
3 Bein Pesach l'Shavuos, pg. 241, quoting an oral ruling from Harav S.Z. Auerbach and Harav S. Wosner.
4 Mishnah Berurah 551:79. When necessary, women may shave their legs; Harav M. Feinstein (Ohalei Yeshurun, pg. 9). See also Igros Moshe Y.D. 2:137 where he allows women to take haircuts when necessary during the Three Weeks. When necessary, a girl of marriageable age may take a haircut; Harav S.Z. Auerbach (Halichos Beisah, pg. 371).
5 Mishnah Berurah 551:20.
6Kitzur Shulchan Aruch 122:5.
7 Igros Moshe O.C. 4:102; She'arim Metzuyanim b'Halachah 122:5.
8 Igros Moshe C.M. 1:93.
9 Mishnah Berurah 551:87.
10 Sha'ar ha-Tziyun 551:91. Aruch ha-Shulchan 551:31, however, seems to hold that only children above the age of chinuch are prohibited to take a haircut. See also Igros Moshe Y.D. 1:224 who agrees with this opinion.
11 Mishnas Ya'akov O.C. 551 quoting Harav Y.Y. Teitelbaum (Satmar Rav).
12 Igros Moshe O.C. 4:112-2; She'arim Metzuyanim b'Halachah 122:1; Sharaga ha-Meir 2:13. Others do not agree with this leniency.
13 Kaf ha-Chayim 551:66. See also Beiur Halachah 551:3, quoting R' Akiva Eiger.
14 Shemiras Shabbos K'hilchasah 42:52.
15 Or the evening before, Mishnah Berurah 493:13. If the bris is on Shabbos, it is permitted to take a haircut on Friday, ibid. If the bris is on Sunday, most poskim do not permit taking a haircut on Friday; see Kaf ha-Chayim 493:36.
And also:
http://revach.net/ask/archives.php?cid=4&subcat=lo+silbashHalacha - cutting mens eyebrows..
Submitted by anonymous Answered by Rav Peretz Moncharsh
Question: Is it permitted to cut mens eyebrows if not plucking out hairs (no tweezer is involved) ?
Answer: It is permitted for a man to trim his eyebrows with a scissors.