Clueless about Breasts

I am a bit embarrassed but for starters I’m a guy. I’ve heard plenty of advice about women from Guys all my life so one of my close friends (girl) recommended me this app where I can ask the ladies some questions that might otherwise never be answered or get the complete wrong advice....

My question or more like my inquiry is, what are the best ways to stimulate the breasts/nipples? I’m not that new to the sex thing and even do I’ve been doin quite alright there are still things I need to learn to become a good lover.

Last girl I was with over the weekend was pretty disappointed by my foreplay and she seemed a bit upset at my handling of her breasts, I usually squeeze gently and do some kissing.... any who, just asking for some tips so I can make both of our experiences a bit more pleasant. Anything helps tbh.

On a side related note, I’ve read in another thread that some girls orgasm with some stimulation of the nipple, is that for every girl or is that something only few can achieve? Any tips will be appreciated thank you 😇