I look down at mine and I'm like, meh. They're just lumps of flesh, what's the big deal? They just get in the way and make me have to wear a stupid bra. Fuck that shit.
When I'm rich I'm going to have top surgery and donate them to someone that wants them.
EDIT: Jesus Christ this has way more replies then it should. We all need to go outside... especially me.
Warning: mild horniness below, trying to describe as clinically as possible from my personal experience:
It’s nice to be cuddled in a bosom, and they make nice pillows. It’s a nice feeling when they squish up against you when hugging skin to skin too, which helps with serotonin release. There’s also an element of trust and acceptance in your partner letting you see their breasts which can advance a relationship.
Sexually, they can be erogenous zones depending on the person’s sensitivity (not just the nipples, I mean) and I like to get my partner off so it helps with that. They also make nice grip points depending on the position you’re using and most of my past sexual partners wanted me to gently hold their breasts by guiding me up there with their hands - I guess because the friction from the motions makes it stimulating (works well with lube/massage lotion) or it was more intimate because of my large hands that could encompass them.
Well, when you put it that way, it makes sense.
Other straight guy: yeah more or less all this