Got Inappropriately approached by an uncle

I was waiting for my friend in fornt of Apex mall and as soon as I got a call from her and sat on my bike, this boomer in his mid 40s approached and complemented my style. He then started his introduction and told me he's a CA and MBA, shook my hand. Nothing out of the ordinary till now. It is something I'm used to since it happens often but this time he was not letting it go. He was saying vague shit like "are you open minded like me?", "do you have some other controversial interests?". I had to use my hand while taking so that he would let of it. Something that really made me mad was him saying "I like your long hair, bade baalo me vo krna easy hota h" in a suggestive tone. He got an idea I am a straight dude so asked me if I have a girlfriend. I obviously said yeah to which he replied that he and his wife met in their DU days. I got a call again and as I had to leave, I had to abruptly kick start my motorcycle in order for him to just shut the fuck up and not shake my hand again. Mind you, I'm 6'2 and was wearing a helmet, gloves, jacket etc. I just happen to have long hair which were visible. He didn't touch me inappropriately otherwise I would've reacted violently to it but in this case, it was even harder to deal with it since I was not experienced with this type of creepy behavior. I was mostly just processing as to what the fuck was going on. If this happens in future, how should I react except from just laughing like an idiot.