Yes it does seem odd. Until you see there a band called boyslikegirls which affects the esti meter. There might be a trademark with the band name.(they seem well established so i would say diffidently). girlslikeboys.net is available. $0 as a use other than the band is hard to come up with. goodluck
\/ your idea on a dating site, might be a headache with the boy/girl minors reference.
You are right; domain appraisal is not an exact science. However, this doesn't apply to the names like the one you have registered. It's worth reg fee or less.