Are Mexican guys good in bed?

No, usually they are not. They never read about sex, not know the most elemental facts about anatomy. They do not want for you to say what you like or do not like. In fact, they do not want for you to speak at all "because make them to lose concentration". They will judge you if you have some preference that he does not like. They think of sexually active women as less valuable than non-active ones, so you should not expect commitment from them, or even friendship. Oh, but they believe they are great, and boast about that all the time!