No. Their masculinity is very similar to other races of humans out there. There are some exceptions to Filipinos who are naturally born gay or from their influence in the public. Generally, Filipinos are not homosexuals, only some are.
It sure seems like it sometimes...but roughly there is the same amount just with more and more fit guys becoming gay now, more and more women are becoming single. Gay men are 50% more common then lesbian women, so that's why it may seem like there are more women but there isn't.
Gay sex is, by definition, gay. If it is just sleeping, then it is not necessarily gay. But, guys do sometimes have sex with guys when they aren't necessarily gay. Think prison. Plus guys can be curious with each other. Also, guys can ow each other favors.