TBH, most of Sri Lankan mindsets are still underdeveloped, despite having the highest education in South Asia.
Sri Lankan education system has several issues, and any government that tries to solve those issues faces moral backlash.
First is consent. I also studied in Sri Lanka but never heard the word "consent." Doing anything without consent counts as a crime. Second, proper sex education should begin from grade 1 and expand based on the child's psychology. (Sex doesn't mean f**k.) Third, this guy might be thinking he has an erect penis, so he is thinking that this white girl would be interested in the same way he is when they watch porn movies. Haha, those aren't magic for those countries, and maybe she doesn't like it or is a lesbian.
And many more ....