hi listen mate i am sure u know ur not large as ur only almost 5 inches = 12 centemetres, quote thats belove average, note: i know a women who broke with her husband cos she said he cant F*** due to his small nob, but she was a well know bitch (loose) but there are very tight girls out there as well, i was hardly 7 inches i done the jelqing excercise for 3 months at least n got me to max 7.75 inches not bad cos i didnt do it so often etc. my penis is full 2 inch wide n over 6 inches in girth i tell u its thick, n the lenght that i told u but many girls consider it small n i am much bigger than urs but also had a young mum who had a baby and my dick was hurting her sex was pain full so its not always good thing ................. -------but in general bigger is better but if u kiss her, lick her, tauch like she want to and work on her alot trust me u will make her happy. try different possions while u having sex women hate doin only one possition till u cum its like a quick. try from behind its a deep penetration, and and u on top of her with her legs spread
considering jelqing excercise it works but it takes time it needs at least 1 hour a day every day to get good result but its takes months for result too but it works. u may need up to 6 months to gain an inch if ur really worried but if ur dick got bigger u woudl be really happy
but also this excercise needs to be done proply,
anyways good luck this all i can say i know its not that much advice but its only what i could help