One of the keys to great sex with a big dick is lube. No mater how much foreplay you do, there's a very high likelihood you'll need to use some sexual lubricants to ease things along. There's no shame in that; you're working with a very thick penis here and it's just not something most vaginas are built to handle.
Lubes come in three primary classes: water-based, silicone-based, and oil-based (the latter of which is not safe for use with latex condoms). Water-based personal lubes are, as the name implies, built with H₂O as their base. They typically use glycerin, glycol, and other slick, viscous fluids to create a body-safe lubricant that's great for sex. The caveat is that the water tends to be absorbed by our fleshy bodies and evaporated by the heat we generate, and become sticky and less-slick, so water-based lubes often require frequent reapplication to keep working optimally. On the upside, that all of the stuff added to water-based lube is water-soluble also means it is easily washed off of the body and out of any fabrics it might get on.
There are many options out there for awesome water-based lubes — these are the best.
K-Y Jelly Lube
Just as slick, but in a thicker "jelly" formulation that stays where you apply it.
Gun Oil H2O water-based lube
More than just water and glycerin, Gun Oil H2O is formulated with moisturizing aloe vera as well as stimulating ginseng and guarana.
Swiss Navy Water-Based Lube
A gel-like lube that's great for toys and sex, and comes packaged in a spill-proof bottle with a locking pump for safe storage.
Astroglide Water-Based Lube
A classic in the sexual lubricants game, Astroglide's water-based lube is popular for a reason.
Wet Silver Water-Based Lube
Hypoallergenic, stain-free and grease-free, moisturizing and lubricating — what's not to like?
Sliquid H2O Water-Based Lube
Paraben-free and 100% vegan-sourced, this lube is safe for your toys, body, and conscience.
Aloe Cadabra Natural Lube
Made from 95% organic aloe vera, this lube is safe for sex, condoms, and toys, and is moisturizing in addition to lubricating.
X Lube Powered Lube
Mix your own lube and save so much money! With X Lube you simply add your own water — just one 3.5oz bottle makes 6 gallons of lube.
Sliquid Swirl Strawberry Pomengranate flavored lube
A delicious fruity flavor for oral sex, body massages, and more.