You can try using the body hair removal cream for sensitive skin like veet. It's ok for bikini area, or in your case, underwear area. Can get it in pharmacies such as watson or guardian. Look for the light blue one, tat's the one for sensitive skin.

Any pharmarcy such as watson and guardian should sell them. Dont worry, guy or girl both can use one... just that they cater more to women because women more concern about their body hair...

The veet hair removal cream for sensitive skin, mostly people use for the hair on their calfs etc, but it's actually for body hair removal. Read at the back there, says it's applicable for bikini area (ur underwear area also can la...), even got the picture show u armpits, legs, and a girl in bikini...

Guy and gal, both body hair same one la... can use can use...

I saw some review. Some say that Nair has a overpowering smelly smell... veet is ok for me though....