I wouldn't say that he is lying or misleading but his experiences seem limited.

First I'd like to point out that there are nearly as many asexual men as women. But because our society expects men to be highly sexual creatures those who are not learn to fake it to fit in or keep silent about it.

Second there are many highly sexual woman who do not need to be urged into sexual relations, undoubtedly you've heard other woman called easy, slutty etc.

My advice, if you are comfortable doing so, would be to allow him to try to arouse you. If it doesn't work have an honest discussion about it. Whatever you do do not fake the arousal.

Sexual compatibility is a complicated dynamic in any relationship but when one of the partners is asexual and the other thinks they can change their partner it can lead to resentment. I urge you to read some articles about no sex marriages or bedroom death.

The most important thing to keep in mind is that this doesn't make you wrong, bad, or even different. Sexual urges are covered over a large spectrum and there is really no wrongs when it comes to desires or lack there of.